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Chemistry: Most Popular Articles

These articles are the most popular over the last month.
Know the Difference Between Baking Powder &...
Baking powder and baking soda both are used to make baked goods rise. Learn the difference between baking powder and baking soda and how to make ingredient substitutions if you run out of one and not the other.
How To Substitute Baking Powder and Baking Soda
Baking powder and baking soda are leavening agents that help baked goods to rise. Here is exactly how to substitute baking powder and baking soda.
Science Quiz - Test Your General Science...
Test your general science knowledge with this fun multiple choice quiz.
20 Chemistry Questions Quiz - 20 Chemistry...
Take a multiple choice quiz to test yourself about general knowledge in chemistry.
This Is How To Calculate Percent Error
Percent error or percentage error is the difference between an approximate or measured value and an exact or known value. Here is how to calculate percent error.
10 Examples of Chemical Reactions in Everyday...
Chemistry happens in the real world, not just a lab. Here are 10 examples of chemical reactions in everyday life.
10 Examples of Chemical Changes That We...
Chemical changes occur when chemical reactions between substances form new products. Get examples of 10 chemical changes in everyday life.
How To Build a Classic Baking Soda Volcano
The chemical volcano is the classic science fair project. This step-by-step recipe will show you how to make your own baking soda volcano.
Quick Chemistry Facts About the Ideal Gas...
The gas constant or R is an important constant in the ideal gas law. This is the definition and value of the gas constant.
Know the Differences Between DNA and RNA
Although DNA and RNA both carry genetic information, there are quite a few differences between them. This is a comparison of the differences between DNA versus RNA, including a quick summary and a detailed table of the differences.
How Much of The Human Body Is Water?
Have you ever wondered how much of your body is water? The percentage of water varies according to your age and gender. Here's a look at how much water is inside you.
How to Calculate the Concentration of a...
Calculating concentration is a basic skill needed by chemistry students. This is a list of steps and examples to calculate the concentration of chemical solutions in percent composition by mass, volume percent, molarity, molality, and normality.
Basics of Acids and Bases Quiz - Test Your...
Basics of Acids and Bases Quiz - Test Your Chemistry Knowledge
What Temperature Does Water Boil?
At what temperature does water boil? What determines the boiling point of water? Here's the answer to this common question.
Get Printable Worksheets To Practice Balancing...
This is a collection of printable worksheets to practice balancing equations. The printable worksheets are provided in pdf format with separate answer keys.
What Does pH Stand For?
Have you ever wondered what pH stands for or where the term originated? Here is the answer to the question and a look at the history of the pH scale.
Equation for the Baking Soda and Vinegar Reaction
The reaction between baking soda and vinegar generates carbon dioxide gas, used in chemical volcanoes. Here is the equation for the reaction between baking soda and vinegar.
Heterogeneous and Homogeneous Mixtures: What's...
Heterogeneous and homogeneous refer to mixtures of materials in chemistry. Learn about the difference between these mixtures and get examples of each type.
What Is STP in Chemistry?
Here's an explanation of what STP is in chemistry and why it is useful, particularly when dealing with gases.
Why You Shouldn't Mix Bleach and Ammonia
Mixing bleach and ammonia is extremely dangerous, since toxic vapors will be produced. Here are the chemical reactions involved in mixing bleach and ammonia and first aid advice if you accidentally become exposed to a bleach and ammonia mixture.
12 Easy Chemistry Projects You Can Do at Home
Want to do a chemistry project but don't have your own laboratory? Here is a collection of experiments using common materials you have at home.
What Is Borax and Where Can You Get It?
Borax is a common household and commercial chemical. Here's a look at what borax is, some facts about borax and how you can get borax.
What Are the 7 Diatomic Elements?
There are seven elements that form homonuclear diatomic molecules or simple molecules with their own atoms. This is a list of the 7 diatomic elements.
10 Examples of Physical Changes
Physical changes involve a new form or shape of matter, but no chemical reaction. This is a list of 10 examples of physical changes.
Is It Okay To Drink Distilled Water?
Distillation is one method of water purification. Is distilled water safe to drink or as good for you as other types of water? The answer depends on a few different factors.
Atom Basics Quiz - Test Your Chemistry Knowledge
Atom Basics Quiz - Test Your Chemistry Knowledge: structure quiz chemistry knowledge model of the atom question quiz science fundamentals
Which Element Are You? - Element Personality Quiz
Which chemical element are you? Technically speaking, you mostly consist of carbon, hydrogen, and oxygen, but which element best represents your personality? Take this fun multiple choice quiz to find out.
13 Reasons To Date a Chemist
Chemists make great dates! Here are some of the reasons to date a chemist.
Get Formulas for Surface Area and Volume of...
Here are the surface area and volume math formulas for a prism.
A List of the Strong Acids
These are the strong acids. There are only six strong acids, so you might want to commit the list of strong acids to memory.
Convert Grams To Moles - Sample Problem
This worked example problem shows how to convert the number grams of a molecule to the number of moles of the molecule.
How to Write a Lab Report
Lab reports are an essential part of all laboratory courses and a significant part of your grade. Here's a format for a lab report you can use if you aren't sure what to write or need an explanation of what to include in the different parts of the report.
What Are the Strong Bases?
Strong bases are bases which completely dissociate in water. Here is a list of the most common strong bases.
Understand the Difference Between Independent...
The difference between independent and dependent variables in a scientific experiment is which variable is being measured. Here's an explanation of how to tell these critical variables apart.
What Are the Types of Chemical Reactions?
When you mix chemicals, you may get a chemical reaction. Learn about the different types of chemical reactions and get examples of the reaction types.
Are Apple Seeds Poisonous?
Apple seeds do contain a small amount of cyanide, which is a lethal poison, but humans are protected from it in several ways.
20 Science Questions Quiz - 20 Science Facts...
Take a multiple choice quiz to test yourself about general knowledge in science.
10 Types of Solids, Liquids, and Gases
Get examples of types of solids, liquids, and gases and learn about the transitions or phase changes between them.
How to Remove Ball Point Pen Ink
Ball point pen ink is not a something that you can usually remove with simple soap and water, but there is an easy and inexpensive way to remove pen ink from surfaces or clothing. Here is what you do.
How to Make a Bouncing Polymer Ball
Use chemistry to make a bouncing polymer ball, then alter the procedure to see the effect the changes have on the characteristics of the bouncing ball.
Know the 3 Types of RNA and Their Functions
One common homework and test question asks you to name the three types of RNA and list their functions. Here's the answer.
What Is the Difference Between Organic and...
Organic compounds and inorganic compounds form the basis for chemistry. Here is a look at the difference between organic and inorganic compounds, plus examples of each type.
Things That Glow in Black or Ultraviolet Light
This is a list of materials that glow under ultraviolet or black light because they contain fluorescent or phosphorescent molecules.
Understand the Difference Between a Cation and...
Cations and anions are both ions. The difference between a cation and an anion is the net electrical charge of the ion. Here are the details on the difference and how to tell them apart.
Interactive Periodic Table of the Elements
This is an interactive periodic table of the elements. Click on an element symbol to get detailed facts for each element.
How To Memorize the Periodic Table
Get step by step instructions to memorize the periodic table of the elements, including printable tables and a blank practice table.
How to Calculate Mass Percent in Chemistry
Mass percent composition of a molecule shows the amount each element in a molecule contributes to the total molecular mass. This step by step tutorial will show the method to determine the mass percent composition of a molecule.
Everything You Need to Know About Crystal Meth
Need crystal meth facts? Learn what crystal meth is, why people takeit, how it's made, and what risks are associated with using methamphetamine.
Why You Shouldn't Mix Bleach and Vinegar
Mixing bleach and vinegar is a bad idea because it produces toxic chlorine gas. Here's what you should know about mixing bleach and vinegar, before you try it.
What Is a Synthesis Reaction in Chemistry?
A synthesis reaction or direct combination reaction is one of the most common types of chemical reactions. Here is a definition, explanation, and example of a synthesis reaction.
What Is Alum?
Find out what alum is and the uses of alum.
Elements by the Numbers: From Hydrogen to...
Here's a list of all of the chemical elements of the periodic table ordered by increasing atomic number. The names and element symbols are provided.
Understanding Endothermic and Exothermic...
Learn about endothermic and exothermic chemical reactions and get instructions to perform your own hot and cold chemistry experiments.
Common Examples of Covalent Compounds
These are examples of covalent bonds and covalent compounds.
Learn About Combustion Reactions
This is an overview of combustion reactions, including what they are, the general format for the reaction, and examples of combustion reactions.
Ionic Compounds Nomenclature Quiz - Can You...
This multiple choice quiz covers ionic compound nomenclature. Test your ability to name ionic compounds and to write the formula of ionic compounds from their names.
What's the Difference Between Chemical and...
Here are some examples of physical changes and chemical changes, along with an explanation of how you can tell physical and chemical changes apart.
3 Steps to Writing Balanced Chemical Equations
Balancing chemical equations is a key chemistry skill. Use these step by step instructions to write and balance chemical equations.
Balancing Equations Practice Quiz
Practice balancing chemical equations with this multiple choice quiz.
Anode vs. Cathode: What's the Difference?
Here is how to define anode and cathode and how to tell them apart.
What Is the Mole Unit of Measurement?
If you take chemistry, you need to know about moles. Find out what a mole is and why this unit is used in chemistry.
Make Your Own pH Indicator with Red Cabbage
Make your own pH indicator solution! Red cabbage juice contains a natural pH indicator that changes colors according to the acidity of the solution. Red cabbage juice indicator is easy to make, exhibits a wide range of colors, and can be used to make your own pH paper strips.
Find the Ka or Equilibrium Constant Values of...
A useful table of Ka and pKa values of common weak acids and their formulas.
Is It Safe To Drink Bleach? Will It Kill You?
Learn whether or not it is safe to drink bleach, what happens if you do, and whether it can kill you.
What Are Examples of a Hypothesis?
Here are examples of a scientific hypothesis and how to improve a hypothesis to use it for an experiment.
What Is the Freezing Point of Water?
What is the freezing point of water or the melting point of water? Are the freezing point and melting point the same? Are there any factors that affect the freezing point of water? Here's a look at the answers to these common questions.
Chemical Reaction Classification Quiz - Test...
There are many different types of chemical reactions. There are single and double displacement reactions, combustion, decomposition reactions and synthesis reactions. See if you can identify the type of reaction in this ten question chemical reaction classification quiz.
What You Need to Know to Calculate pH
Review how to calculate pH and what pH means with respect to hydrogen ion concentration, acids, and bases.
What's the Difference Between Ionic and...
Ionic and covalent bonds hold molecules together. Learn to distinguish between ionic and covalent bonds, and determine whether a bond will be polar or nonpolar.
What Is the pH of Water?
The pH of water is a value you should know, plus it's good to understand why the actual pH of water might differ from the theoretical value.
Over 20 Fun Kitchen Science Experiments for Kids
Do you want to explore science, but can't find or can't afford chemicals? You can explore the fun of science in your own kitchen. Here are some science experiments and projects you can do that use common kitchen chemicals.
Chem Students Should Know These Acid and Base...
Here are the names and formulas of some of the common acids and bases.
Bleach and Alcohol Make Chloroform
Mixing bleach and alcohol is a bad idea because the chemicals react to make chloroform. Here's a look at what happens and the risks associated with mixing these chemicals.
An Easy Way to Calculate Molarity of a Solution
Molarity is a unit of concentration measuring the number of moles of a solute per liter of solution. Here is how to calculate molarity of a solution.
Independent Variable Definition and Examples
This is the definition of an independent variable, with examples. An independent variable is one of the key factors in a scientific experiment.
How to Calculate Normality of a Solution
The normality of a solution is the gram equivalent weight of a solute per liter of solution. Here's an example of how to calculate the normality of a solution.
List of All the Elements That Are Metals
Most elements are metals. This group includes the alkali metals, alkaline earth metals, transition metals, basic metals, and rare earth elements.
Polyatomic Ions You Need To Know
This is a list of some of the most common polyatomic ions. It is worth committing the polyatomic ions to memory, including their molecular formulas and ionic charge.
Baking Soda and Vinegar Erupting Volcano
The baking soda and vinegar volcano is the classic chemical volcano that you see at science fairs. Watch how easy it is to make a chemical volcano that produces a memorable eruption.
What Is the Most Conductive Element?
Here is a look at the three most electrically conductive elements. As you might expect, all three conductive elements are metals.
Element Picture Quiz - Test Your Recognition of...
Can you recognize the elements when you see them? Here's a quiz that tests your ability to identify an element based on its appearance.
How to Make Homemade Slime (Classic Recipe)
This is a classic recipe for homemade slime. It's super-easy, plus I included tips for success.
Can You Drink too Much Water?
Is it really possible to drink to much water? Learn about water intoxication and hyponatremia.
Determine Concentration Using Titration
Here is an acids and bases example problem involving titration. A base of known concentration is used to neutralize an unknown concentration of an acid.
How to Determine the Empirical and Molecular...
The empirical formula of a chemical compound is the simplest whole number ratio between the elements. The molecular formula is the actual whole number ratio between the elements. This step by step tutorial shows how to calculate the empirical and molecular formulas for a compound.
How Does the Fermentation Process Actually Work?
Fermentation is a process used to produce wine, beer, yogurt and other products. Here's a look at the chemical process that occurs during fermentation.
What's the Mole Ratio in a Chemical Reaction?
This is the definition of mole ratio of a chemical reaction, with an example.
Periodic Table Quiz - Test Your Periodic Table...
Test your periodic table knowledge with this fun multiple choice quiz.
Examples of Compounds with Ionic Bonds
Ionic compounds form when elements share electrons. Here are examples of ionic bonds and ionic compounds.
pH of Common Chemicals
pH is a measure of the acidity of a substance. Here's a table of the pH of several common chemicals.
Your Guide on How to Make Smoke Bombs
Learn how to make a smoke bomb. This is the list of materials required for making your own smoke bomb.
Quick Facts About Muriatic Acid
Here is a look a what muriatic acid is, where you can find it, and the uses of muriatic acid.
Metals vs. Nonmetals: What's the Difference?
Elements may be classified as either metals or nonmetals, based on their properties. Here's a look at the differences between the metals and nonmetals.
How to Convert Celsius to Kelvin
Celsius and Kelvin are two important temperature scales. It is easy to convert Celsius to Kelvin with these steps.
How Can I Get Fluoride Out of My Water?
Learn how to remove fluoride from drinking water and how to reduce your exposure other ways.
How to Calculate Theoretical Yield of a...
Before performing chemical reactions, it is helpful to know how much product will be produced with given quantities of reactants. This is known as the theoretical yield. Here's how to calculate it.
What are the Mood Ring Colors and Meanings?
This chart shows the colors of the typical 1970s mood ring and the meanings associated with the mood ring colors.
What Are Chemical and Physical Changes?
Chemical and physical changes relate to matter properties. Find out what chemical and physical changes are, get examples, and learn how to tell them apart.
Examples of Endothermic Reactions
This is a list of chemical reactions that are endothermic reactions. You can try these reactions to make homemade cold packs.
6th Grade Science Quiz - Test Your 6th Grade...
Test your 6th grade general science knowledge with this fun multiple choice quiz.
What Are the Properties and Characteristics of...
Here are the properties shared by the ionic compounds.
Solubility Rules of Ionic Solids in Water
This is a list of the solubility rules for ionic solids in water. While it's a good idea to memorize them, the list is a good reference to use.
Easy Way To Grow Borax Crystal Snowflakes
It's easy to grow your own sparkling clear or colored borax crystal snowflakes. Here's what you do.
What Is a Pure Substance?
A pure substance or chemical substance is a material that is homogeneous and has constant properties throughout the sample. Here are examples of pure substances.
Handy List of All the Element Symbols
The elements are the basis for all matter. Learn the one and two letter symbols for the chemical elements of the periodic table using this handy list.
18 Fun and Easy Slime Recipes
There's more than one way to make slime. Actually, there are lots of different recipes! Here are some of the best recipes for different types of slime, from normal slimy slime to eerie glow-in-the-dark slime.
What Does Concentration Mean in Chemistry?
This is the definition of concentration, as used in chemistry.
Big Collection of Printable PDF Periodic Tables
Download or print these PNG and PDF printable periodic tables to help work chemistry problems or to predict properties of the elements.
Synthesis Reactions and Examples
This is an explanation of what synthesis reactions are, the general form of the reaction, plus there are examples of synthesis reactions.
What Is the Chemical Composition of Air?
Learn about chemical composition of the Earth's air. Percentages of the most common compounds are given, according to volume.
Science Experiments: What Are Variables?
Variables are an important part of science projects and experiments. Here is an explanation of what a variable is and a description of the different types of variables you'll encounter in science.
What Happens If You Drink Too Much Green Tea
Learn about the toxic health effects of drinking too much green tea and how much it's safe to drink in a day.
Is Milk an Acid or a Base?
Have you ever wondered about the pH of milk and whether it is an acid or a base? Here's a look at the pH of milk.
Understand the Difference Between Oxidation and...
Oxidation and reduction reactions involve an exchange of electrons between reactants. Here is how to tell which reactant was oxidized and which was reduced.
Chemical Bonds & Compounds Chemistry Quiz
Chemical Bonds & Compounds Chemistry Quiz: electron dot structures ionic covalent bonds lewis electron dot structures chemistry quiz chemistry quizzes
Why Do Cheap Rings Turn Your Fingers Green?
Have you ever had a ring turn your finger green? The reason this happens is because of the metal content of the ring. Here's a look at what's happening.
Make Hot Ice from Vinegar and Baking Soda
Sodium acetate, also known as 'hot ice' is an amazing chemical you can easily prepare yourself using baking soda and vinegar. The crystallization is an exothermic process, so the resulting ice is hot.
Control vs. Experimental Group: How Do They...
Learn about the difference between the control group and the experimental group in a scientific experiment.
What Is the Density of Water?
The density of water is related to its specific gravity. The density is the weight of the water per its unit volume, which depends on the temperature of the water. While you can round the density to 1 gram per milliliter, here are more precise values for you.
pH of Household Products Quiz
pH of Household Products Quiz - See whether you know the pH of chemicals around your home.
What Causes Brain Freeze?
If you've ever experienced a sudden stabbing pain in your forehead when eating ice cream or enjoying a cool drink then you know what brain freeze is. Do you know what causes brain freeze or how you can stop the pain?
A Slimy Chemistry Experiment You Should Try
Get step-by-step instructions for making classic slime.
Know What Happens If You Mix Regular and...
Have you ever wondered what would happen if you mixed regular and synthetic motor oils? Here's the answer to the question and a look at whether you should ever mix oils or whether it could damage your vehicle's engine.
Learn What Chemical Properties Are and Get...
Here is an explanation of what chemical properties are, plus several examples of chemical properties of matter.
Element Groups - Periodic Table of the Element...
Groups of Elements - This is an interactive periodic table of the elements.
Learn Key Acids and Bases Definitions
Understanding acids and bases is important for grasping chemistry concepts. Here's an introduction to acids and bases, with definitions for key acid and base terms.
How To Make Saline Solution at Home
Saline solution refers to a salt solution, which you can prepare yourself using readily available materials. The solution can be used as a disinfectant, sterile rinse, or for labwork.
Will Mango Skin Give You a Poison Ivy Reaction?
Can you eat the skin of a mango? The answer depends on a few different factors. Here's a look at the good chemicals in mango, as well as one that can cause a nasty reaction.
How To Blow Giant Bubbles That Won't Pop
If you're tired of bubbles that pop as soon as you blow them, try this recipe for unbreakable bubbles!
Working on a Science Project? Start With the...
Science fair and research projects apply the scientific method. Here's an explanation of the scientific method and how the scientific method is used.
What Is STP?
STP, Standard Temperature and Pressure definition, as used in chemistry and other physical sciences.
How to Make Homemade Rock Candy or Sugar Crystals
These are step by step instructions for growing your own sugar crystals or rock candy.
9th Grade Science Test
Test your general science knowledge of 9th grade science with this fun online multiple choice quiz.
Do You Know the Names of 10 Acids?
Here is a list of ten common acids with chemical structures.
How Does Soap Clean?
Have you ever wondered how soap cleans? Here's an explanation of how soap works and an introduction to saponification, surfactants and emulsifiers.
Which Mad Scientist Are You? - Mad Scientist...
If you were a famous mad scientist, which mad scientist would you be? Take this fun multiple choice quiz to find out.
What Are Farts Made Of?
Have you ever wondered what farts are made of and whether they are the same for everyone? Here's a look at the chemical composition of farts.
What's the Difference Between a Scientific...
Learn about the difference between a scientific law, hypothesis, and theory.
6 Homemade Modeling Clay Recipes
There are several ways you can make homemade clay for modeling, making ornaments, and for other projects and crafts. Here are several clay recipes, including a refrigerator clay, a clay you bake to harden, one you coat for a glossy finish, and one that works up and stays pliable much like store-bought modeling clay.
What Is the Difference Between Celsius and...
Learn the difference between Celsius and centrigrade temperature scales.
Which Alchemy Element Are You? - Personality Quiz
If you were an alchemical element which of the 5 elements would you be? The classic 5 elements of alchemy are earth, fire, air, water and aether. Which best represents your personality? Take this fun multiple choice quiz to find out.
How to Calculate Mass Percent Composition
This is a worked example problem showing how to calculate mass percent composition.
3 Ways To Calculate Atomic Mass
The atomic mass or atomic weight of an element is a weighted average of all the element's isotopes based on their natural abundance. It is simple to calculate the atomic mass of an element with these steps.
What Properties Make Metals Unique?
Most of the chemical elements are metals of one variety or another. Learn about some of the properties common to this large element group.
Chemistry: What is a Solution?
Solution definition, as used in chemistry, chemical engineering, and physics.
What Are the 3 Parts of a Nucleotide?
You may be asked to name the three parts of a nucleotide and explain how they are connected or bonded to each other. Here's the answer for both DNA and RNA.
How to Prepare a Sodium Hydroxide Solution
Special care is required to prepare a solution of sodium hydroxide or NaOH in water because considerable heat is liberated by the exothermic reaction. Here is how to make a sodium hydroxide solution safely, along with recipes for several common concentrations of NaOH solution.
What Are Solutions, Suspensions, Colloids, and...
Learn how to distiguish between solutions, suspensions, colloids, and dispersions. Get examples of the different types of mixtures.
How to Grow Great Crystals
Learn how to grow crystals yourself using common ingredients you have at home. Avoid common problems and get tips and tricks for successful crystal growth.
Use the Activity Series of Metal To Predict...
The activity series of metals is an empirical tool used to predict products and reactivity of metals with water and acids in replacement reactions and ore extraction.

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