# Chemistry Calculations

Accuracy and Precision Review

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

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.

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.

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.

Celsius to Kelvin Temperature Conversion

Here is an example problem that explains how to convert a temperature from degrees on the Celsius scale to Kelvin.

Converting Celsius to Fahrenheit

This example problem illustrates the method to convert temperatures from Celsius to Fahrenheit.

Converting Celsius to Kelvin

This example problem illustrates the method to convert temperatures from Celsius to Kelvin.

Converting Fahrenheit to Celsius

This example problem illustrates the method to convert Celsius to Fahrenheit.

Converting Fahrenheit to Kelvin

This example problem illustrates the method to convert Fahrenheit to Kelvin.

Converting Kelvin to Celsius

This example problem illustrates the method to convert temperatures from Kelvin to Celsius.

How to Calculate the Limiting Reactant of a Chemical Reaction

Chemical reactions rarely occur when exactly the right amount of reactants will react together to form products. One reactant will be used up before another runs out. This reactant is known as the limiting reactant. This is a strategy to follow when determining which reactant is the limiting reactant.

How to Calculate Molarity of a Solution

Molarity is a unit of concentration measuring the number of moles of a solute per liter of solution. This outlines a straightforward method to calculate molarity of a solution.