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# Chemistry Quick Review

These are review sheets to help you study chemistry. There are reviews of concepts, equations, worked examples, and study tips. You can use these to refresh your memory before a big test or to quickly review important concepts.

How To Learn Chemistry Fast
Do you need to learn chemistry fast? If you're serious, it's possible. Here is how you do it!

Accuracy and Precision Review
Here's a quick review of the concepts of accuracy and precision.

Acid-Base Titrations
An acid-base titration is a neutralization reaction that is performed in the lab in order to determine the concentration of an unknown acid or base. The moles of acid will equal the moles of base at the equivalence point. Here's how to perform the calculation to find your unknown.

Atomic Mass and Atomic Mass Number
Here's a quick review of what is meant by atomic mass and atomic mass number, as well as how actual particle mass relates to atomic number.

Atomic Weight Calculation
The atomic weight of an element depends on the abundance of its isotopes. If you know the mass of the isotopes and the fractional abundance of the isotopes, you can calculate the element's atomic weight.

Avogadro's Law is a specific instance of the Ideal Gas Law in which volume is directly proportional to the number of moles at constant temperature and pressure. Here's how to solve a direct proportion problem using Avogadro's Law.

Balancing Chemical Equations
Being able to balance chemical equations is a vital skill for chemistry. Here's a look at the steps involved in balancing equations, plus a worked example of how to balance an equation.

Boyle's Law Calculation
Boyle's Law is a special case of the Ideal Gas Law in which the pressure and volume of an ideal gas are inversely proportional to each other, providing the temperature and mass of the gas are held constant. Here's an example of how to perform a calculation using Boyle's Law.

Charles' Law Calculation
Charles' Law is a specific instance of the Ideal Gas Law in which volume and temperature are linearly proportional at constant pressure and mass. Here's how to solve a direct proportion problem using Charles' Law.

Dilutions from Stock Solutions
If you're working in a chemistry lab, it's essential to know how to calculate a dilution. Here's a review of how to prepare a dilution from a stock solution.

Equation of a Line
There are many instances in science and math in which you will need to determine the equation of a line. Here's a quick overview and example of how to determine the equation of a line from (x,y) data.

Experimental Error Calculations
Here's a quick review of different ways of calculating experimental error along with worked example problems.

Mass of Liquids from Density
Review how to calculate the mass of a liquid from its volume and density.

Mean or Average - Calculate the Mean
It's very important to know how to calculate the mean or average of a set of numbers. Among other things, this will allow you to calculate your grade point average. However, you'll need to calculate the mean for several other situations, too.

Metric or SI Units
Calculations in chemistry and physics usually use metric or SI units. Here's a quick review of unit prefixes, fundamental units, and derived units.

Molecular Formula and Empirical Formula
Here is a look at what the molecular formula and empirical formula are and steps for finding the molecular formula and empirical formula.

pH Calculations
Review how to calculate pH and what pH means with respect to hydrogen ion concentration, acids, and bases.

pOH Calculations
Sometimes you are asked to calculate pOH rather than pH. Here's a review of the pOH definition and an example calculation.

Prepare a Solution
Here's a quick overview of how to prepare a solution when the final concentration is expressed as M or molarity.

Volume Percent Concentration
Learn what volume percent or volume-volume percent concentration means and how to calculate volume percent when preparing a solution.

Word Problem Strategy
Many problems in chemistry and other sciences are presented as word problems. Word problems are as easy to solve as numerical problems once you understand how to approach them.