09/14/03 - Single Bond Energies
This is a table of single bond energies in units of kJ/mol at 25°C. Use these values to predict whether a reaction will be endothermic or exothermic and to calculate change in enthalpy for gases.
09/07/03 - Bathroom Chemistry Quiz
Do you know about the chemistry of excretion and toiletries? Let's find out! Take this multiple choice quiz and test your bathroom knowledge.
08/31/03 - Sample Problems - Heats of Formation
These are examples of how to calculate the heats of formation for compounds and ions in aqueous solution. Links are given to rules of thermochemistry and explanations of endothermic and exothermic reactions.
08/24/03 - Chemistry of Hard and Soft Water
Do you have hard water or soft water? Both? Do you know why? Get the definitions for hard and soft water, learn about their chemistry, and examine the pros and cons of each type of water.
08/20/03 - Electrochemical Cells
Learn about galvanic (voltaic) and electrolytic cells. You'll also get information about anodes and cathodes and direction of electron flow in the two electrochemical cells.
08/10/03 - Calculating Concentration
Do the units for solution concentration confuse you? Get definitions and examples for calculating percent composition by mass, mole fraction, molarity, molality, and normality. I've also included a bit of information on dilutions.
08/03/03 - Sample Problems - Enthalpy Change
This is a set of worked thermochemistry problems for calculating the change in enthalpy. Links are given to rules of thermochemistry and explanations of endothermic and exothermic reactions.
07/30/03 - Laws of Thermochemistry
Certain rules or laws apply to thermochemical equations and enthalpy. These are explanations and examples of these laws, including Hess's Law.
07/29/03 - Crystal Growing - Science Fair Project Ideas
Are you looking for a science fair project idea? Here are some ways you can turn crystal growing into a research project. There are links to instructions for growing different types of crystals and for designing a great science fair project, too.
07/27/03 - How to Grow a Big Alum Crystal
Do you want to grow a big single crystal instead of a mass of crystals? Then try out these instructions for growing a big alum crystal. You can apply the techniques used here to grow big single crystals of other substances, too.
07/25/03 - Heats of Formation - Anions/Cations
This is a table of molar heats of formation for common anions and cations in aqueous solution.
07/21/03 - Types of Inorganic Chemical Reactions
There are four main categories of inorganic chemical reactions. Can you name them all? Here they are, along with examples of each type.
07/15/03 - Reactions in Water or Aqueous Solution
Let's review some important types of reactions that occur in aqueous solution and take a look at the rules that are used when writing balanced equations for water reactions.
07/14/03 - Sample Problems - Reactions in Aqueous Solution
These are examples of calculations for determining limiting reactant, theoretical yield, number of moles, and mass in grams for reactions in water solutions.
07/08/03 - Sports Drinks - Better than Water?
Are you exercising or sweating away under a summer sun? Find out what beverage to drink to get and stay hydrated. Do you think water is best? Are sports drinks worth the money? What about a beer? Here's what you need to know.
07/02/03 - Everyday Chemistry Quiz
Do you read labels and keep up with chemistry as it affects your daily life? Here's a ten question quiz you can take to test your knowledge. Are you ready? Have fun!
06/30/03 - Incompatible Chemical Mixtures
Here's a list of chemicals that you don't want to accidentally mix, together with brief statements about the expected reactions. Use this information to avoid accidents and ensure safe storage and handling of potentially dangerous substances, both at work and at home.
06/27/03 - Heats of Formation
Here's a handy table of the molar heats of formation for many common compounds. It's a must-have for thermochemistry calculations!
06/27/03 - Functional Groups - Organic Chemistry
These are important organic functional groups containing nitrogen or oxygen. Learn 'em, live 'em, love 'em!
06/26/03 - Firework Periodic Table
Use this special periodic table to find out what elements are found in fireworks and how they are used. Just click on an element to learn more.
06/25/03 - Sample Problems - Concentration and Molarity
These are examples of concentration and molarity calculations, with links to other worked chemistry problems and homework help.
06/23/03 - Solubility of Ionic Compounds in Water
Here's a table of the solubility rules for common ionic solids in water, as well as an explanation of the main factors which affect solubility.
06/19/03 - What Causes Rigor Mortis?
Dead bodies are sometimes referred to as 'stiffs' for a reason! Learn what rigor mortis is and find out why it happens.
06/17/03 - Sample Problems - Limiting Reactant & Theoretical Yield
These are examples of calculations for determining the limiting reactant and theoretical yield of a reaction, with links to other worked chemistry problems and homework help.
06/14/03 - Drugs from Plants
This is a table listing many of the pharmaceuticals that are derived from plants, including the name of the drug, its action, its plant source, and the common names of the plants.
06/12/03 - Element Hangman Game
The names of all of the elements have been entered into the game, but you're given a small hint to narrow down the possibilities. Can you figure out the element name in time?
06/08/03 - Chemistry Hangman Game
Let's have some fun! Here's a hangman game with a chemistry theme. Refer to the Chemistry Glossary if you need ideas for words.
06/08/03 - Basic Online Calculator
Sometimes you just need to use a quickie calculator! Here's one for addition, subtraction, multiplication, and division.
