Chemistry: Most Popular Articles
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.
Learn the difference between baking powder and baking soda and how to make ingredient substitutions if you're out!
Test your general science knowledge with this fun multiple choice quiz.
Take a multiple choice quiz to test yourself about general knowledge in chemistry.
The periodic table of the elements contains a wide variety of information. Information such as element symbols, atomic number and atomic mass is most common, but some periodic tables can contain even more data than previously expected. This will show you how to use a periodic table to gather information about the elements.
Basics of Acids and Bases Quiz - Test Your Chemistry Knowledge
Baking powder and baking soda both are leavening agents that help baked goods to rise. They are not the same chemical, but you can substitute one for another in recipes. Here's how.
Atom Basics Quiz - Test Your Chemistry Knowledge: structure quiz chemistry knowledge model of the atom question quiz science fundamentals
You can use safe, natural ingredients to make natural dyes to color Easter eggs. This is a fun Easter project that is fun and easy for the whole family to try this holiday season.
Learn what crystal meth is, why people take crystal meth, how it's made, and what risks are associated with using methamphetamine.
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. Make dilutions by adding the correct volume of solvent to make a new solution.
If you don't have buttermilk on hand, it's easy to apply a little kitchen chemistry to make buttermilk from regular milk. Here are 5 simple buttermilk substitute recipes.
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.
Use these step by step instructions to write and balance chemical equations.
This is an interactive periodic table or chart of the chemical elements. Click on an element symbol to get detailed information for each element.
Use chemistry to make a bouncing polymer ball, then alter the procedure to see the effect the changes have on the charactertistics of the bouncing ball.
Percent error or percentage error expresses as a percentage the difference between an approximate or measured value and an exact or known value. Here is how to calculate percent error, with example calculations.
At what temperature does water boil? What determines the boiling point of water? Here's the answer to this common question.
The chemical volcano is the classic science fair project. Baking soda and vinegar combine to produce carbon dioxide, which builds up pressure in the center to cause an eruption of foamy lava. You can even color the lava to resemble a real volcanic eruption. This step-by-step recipe will show you how to make your own baking soda volcano.
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.
Is it really possible to drink to much water? Learn about water intoxication and hyponatremia.
Chemical changes involve chemical reactions and the creation of new products. This is a list of 10 examples of chemical changes.
Download or print these periodic tables to help work chemistry problems or to predict properties of the elements. The printable tables work well on mobile devices, such as Android phones, iPads as well as PC and Macs.
Here is how to define anode and cathode and how to remember which is which.
Gas Constant (R) definition, as used in chemistry, chemical engineering, and physics.
These are the strong acids. There aren't very many strong acids, so you might want to commit the list of strong acids to memory.
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.
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.
Here's an explanation of what STP is in chemistry and why it is useful, particularly when dealing with gases.
Lab reports are an essential part of all laboratory courses and usually a significant part of your grade. If your instructor gives you an outline for how to write a lab report, use that. 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.
If you're tired of bubbles that pop as soon as you blow them, try this recipe for unbreakable bubbles!
Learn about endothermic and exothermic chemical reactions and get instructions to perform your own hot and cold chemistry.
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 element best represents your personality? Take this fun multiple choice quiz to find out.
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.
Learn how to remove fluoride from drinking water.
Learn about natural ways to repel mosquitoes and develop strategies to reduce your exposure to them.
There are seven elements that form diatomic molecules. This is a list of the seven diatomic elements.
Learn about the different types of chemical reactions and get examples of the reaction types.
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. It is also helpful to predict how much reagent you will need in order to produce a specific amount of products. This is a strategy to use when calculating theoretical yield of a chemical reaction.
The reaction between baking soda and vinegar generates carbon dioxide gas, which is used in chemical volcanoes and other projects. Here is a look at the reaction between baking soda and vinegar and the equation for the reaction.
Here's a list of chemical elements ordered by increasing atomic number. The names and element symbols are provided.
The empirical formula of a chemical compound is a representation of the simplest whole number ratio between the elements comprising the compound. The molecular formula is the representation of the actual whole number ratio between the elements of the compound. This step by step tutorial shows how to calculate the empirical and molecular formulas for a compound.
Practice balancing chemical equations with this multiple choice quiz.
Review how to calculate pH and what pH means with respect to hydrogen ion concentration, acids, and bases.
Molarity is a unit of concentration measuring the number of moles of a solute per liter of solution. The strategy to solving molarity problems is fairly simple. This outlines a straightforward method to calculate molarity of a solution.
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.
pH of Household Products Quiz: multiple choice questions chemistry quiz metal quiz hydrogen ion chemistry articles
This is a list of 10 examples of physical changes.
Here are the names and formulas of some of the common acids and bases.
Strong bases are bases which completely dissociate in water. Here is a list of the most common strong bases.
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.
This is a classic recipe for homemade slime.
Although Super Glue sticks to just about anything almost instantly, you can remove it, even from skin and clothes. Here's how to remove Super Glue or other cyanoacrylate adhesive.
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.
Here are examples of a scientific hypothesis.
This alphabetical list of gemstones includes the mineral names of the gemstones as well as links to photos of the gems.
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.
Learn how to make a smoke bomb. This is the list of materials required for making your own smoke bomb.
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.
It is easy to convert Celsius to Kelvin with these steps.
Have you ever wondered why hair turns gray as you get older and whether there is something you can do to prevent graying or at least slow it down? Here's a look at what causes hair to turn gray and some of the factors that affect graying.
Here are some examples of physical changes and chemical changes, along with an explanation of how you can tell physical and chemical changes apart.
Learn the one and two letter symbols for the chemical elements.
The difference between independent and dependent variables in a scientific experiment is which variable is being measured.
Ionic Bond definition, as used in chemistry, chemical engineering, and physics.
Mixing bleach and ammonia is extremely dangerous, since toxic vapors will be produced. The primary toxic chemical formed by the reaction is chloramine vapor, with a potential for hydrazine formation. Here's a look at the chemical reactions involved in mixing bleach and ammonia, as well as some first aid advice if you accidentally become exposed to a bleach and ammonia mixture.
Here's a table of the pH of several common chemicals.
Could you pass an 8th grade science quiz? Test your general science knowledge with this fun multiple choice quiz.
You can calculate the pH of a buffer solution or the concentration of the acid and base using the Henderson Hasselbalch equation. Here's a look at the Henderson Hasselbalch equation and a worked example that explains how to apply the equation.
Test your 6th grade general science knowledge with this fun multiple choice quiz.
This is a list of the solubility rules for ionic solids in water.
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.
Heterogeneous and homogeneous refer to mixtures of materials in chemistry. The difference between heterogeneous and homogeneous mixtures is the degree at which the materials are mixed together.
Do you think you have a basic understanding of chemistry? Take a multiple choice quiz to test yourself about general knowledge in chemistry.
Learn about strong and weak acids and bases. Get definitions and examples of each type.
Here is a look at what the molecular formula and empirical formula are and steps for finding the molecular formula and empirical formula.
Take a multiple choice quiz to test yourself about general knowledge in science.
This worked example problem shows how to convert the number grams of a molecule to the number of moles of the molecule.
Find out what chemical and physical changes are, get examples, and learn how to tell them apart.
Rust stains can be a challenge to remove because the stain consists of tiny iron oxide particles, plus some treatments actually set the stain rather than remove it. Use a little chemistry know-how to successfully remove a rust stain.
Learn to distinguish between ionic and covalent bonds, and determine whether a bond will be polar or nonpolar.
Instructions for making your own chemical dip to polish silver.
You can make natural insect repellent yourself. The insect repellent is safe and effective, plus it costs much less to make it than to buy it.
STP, Standard Temperature and Pressure definition, as used in chemistry and other physical sciences.
Here's a look at some of the career options available to you in the field of chemistry.
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.
These are step by step instructions for growing your own sugar crystals or rock candy.
Chemical Bonds & Compounds Chemistry Quiz: electron dot structures ionic covalent bonds lewis electron dot structures chemistry quiz chemistry quizzes
Learn how to assign oxidation numbers to keep track of the distribution of electrons during a chemical reaction.
This is a collection of printable worksheets to practice balancing equations. The printable worksheets are provided in pdf format with separate answer keys.
Get step-by-step instructions for making classic slime.
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.
The Nernst equation is used to calculate the voltage of an electrochemical cell or to find the concentration of one of the components of the cell. Here is a look at the Nernst equation and an example of how to apply it to solve a problem.
This is an overview of combustion reactions, including what they are, the general format for the reaction, and examples of combustion reactions.
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.
Metric to Metric Quiz - Test Your Chemistry Knowledge
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.
Learn what marijuana and THC are, why people use marijuana, where it comes from, and what risks are associated with using marijuana.
Several factors affect the rate at which chemical reactions proceed. Understanding these factors will help you predict the direction and speed of a chemical reaction.
List of materials that glow under ultraviolet or black light.
Most elements are metals. This group includes the alkali metals, alkaline earth metals, transition metals, basic metals, and rare earth elements.
These are examples of covalent bonds and covalent compounds.
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.
No one wants to live next door to a meth lab, but how do you know if there is one in your neighborhood? One way you might suspect illegal drugs are being made is by their smell.
Isotopes definition, as used in chemistry, chemical engineering, and physics.
Start learning chemistry with the basics. Learn what chemistry is, what chemists do, and why it's important to study chemistry.
Butylated hydroxyanisole (BHA) and butylated hydroxytoluene (BHT) are added to many foods to prevent fat spoilage. This article describes what BHA and BHT are, what they do, and how they do it. There is a fairly lengthy list of references because there is controversy over the health effects of BHA, BHT, and other additives.
Find out what alum is and the uses of alum.
Sugar and string Easter egg ornaments are a fun family craft idea, plus you can include a lot of science in this project. You can make smaller hollow string ornaments to hang or put in baskets or you can make a large crystal egg to use as an Easter basket.
Make Ice Cream in a Baggie - Freezing Point Depression and Colligative Properties
Learn about what an acid-base indicator is and choose an acid-base indicator from this comprehensive table of acid-base indicators, based on pH range or color change.
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.
If you were a famous mad scientist, which mad scientist would you be? Take this fun multiple choice quiz to find out.
Step-by-step instructions for balancing redox reactions for conservation of mass and charge in electrochemistry.
Are you confused about how chemical engineering differs from pure chemistry or other types of engineering? Here's an explanation of what chemical engineering is and what chemical engineers do.
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.
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?
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.
Have you ever had a ring turn your finger green or wondered why some people say rings turn their fingers green? The reason this happens is because of the metal content of the ring. Here's a look at what's happening.
One common homework and test question asks you to name the three types of RNA and list their functions. Here's the answer.
Here is a look a what muriatic acid is, where you can find it, and the uses of muriatic acid.
Scientific Method Quiz - Chemistry Tests and Quizzes
Find out why you cry when you cut onions and how you can keep it from happening.
Allotrope definition, as used in chemistry, chemical engineering, and physics.
Apples, along with cherries, peaches and almonds, are members of the rose family. The seeds of apples and these other fruits contain natural chemicals that are toxic to some animals. Are they poisonous to humans? Here's a look at the toxicity of apple seeds.
Learn what crack cocaine is, why people take crack, how it's made, and what risks are associated with using crack cocaine.
Perfume is a classic gift, but it's even better if it is a scent that you made yourself, especially if you package it in a beautiful bottle. Perfume you make yourself is free from synthetic chemicals and is fully customized to your personal taste. Here's how to make your own perfume.
Cations and anions are both ions. The difference between a cation and an anion is the net electrical charge of the ion.
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.
Use this chemistry glossary to look up the definitions of chemistry terms beginning with the letter A.
Functional groups are collections of atoms in a molecule that participate in characteristic reactions. If you are taking organic chemistry, it's a good idea to memorize important functional groups or at least bookmark a past listing functional groups so that you can refer to it.
This is a worked example problem showing how to calculate mass percent composition.
Test your general science knowledge of 9th grade science with this fun online multiple choice quiz.
Find out what a mole is and why this unit is used in chemistry.
It's possible to make dry ice at home. Here are instructions and safety information on how to do it.
Learn what rohypnol is, why people take rohypnol, how it's made, and what risks are associated with using rohypnol.
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.
Oxidation and reduction are two types of chemical reactions that often work together. Oxidation and reduction reactions involve an exchange of electrons between reactants. For many students, the confusion occurs when attempting to identify which reactant was oxidized and which reactant was reduced. What is the difference between oxidation and reduction?
Buffers are an important concept in acid-base chemistry. Here's a look at what buffers are and how they function.
How well do you know laboratory safety signs and hazard symbols? Take this fun quiz to see if you can recognize potential dangers in the lab.
Read funny chemistry jokes, puns, and riddles and find other chemistry humor.
A useful table of Ka and pKa values of common weak acids and their formulas.
This chart shows the colors of the typical 1970s mood ring and the meanings associated with the mood ring colors.
Learn about chemical composition of the Earth's air. Percentages of the most common compounds are given, according to volume.
This is an introduction to oxidation-reduction reactions, also known as redox reactions. Learn what redox reactions are, get examples of oxidation-reduction reactions, and find out why redox reactions are important.
This is a collection of chemistry worksheets in pdf format. The answers to the questions are available on separate worksheets so you can fill them out and then check your work.
Rock candy is candy made by crystallizing sugar. You can grow sugar crystals yourself, plus add color and flavor to make rock candy that you can eat.
Learn about the different types of chemical bonds and the forces that affect the way electrons are shared.
Molarity and molality are both measures of concentration of solutions. One is the ratio of moles to volume of the solution and the other is the ratio of moles to the mass of the solution.
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.