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Chemistry Calculations

See examples of several types of chemistry calculations. Example calculations include unit conversions, balancing equations, calculating concentration, finding pH, and many more.

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.

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