AP Chemistry--Stoichiometry Plus

Front

What is stoichiometry?

Back

Stoichiometry is the branch of chemistry that deals with the calculation of reactants and products in chemical reactions based on the conservation of mass.

Front

Define limiting reactant.

Back

The limiting reactant is the substance that is completely consumed in a chemical reaction, limiting the amount of product that can be formed.

Front

What is percent yield?

Back

Percent yield is a measure of the efficiency of a reaction, calculated as (actual yield / theoretical yield) x 100%.

Front

How do you calculate the molar mass of a compound?

Back

To calculate the molar mass, sum the atomic masses of all atoms in the compound's formula.

Front

What is the empirical formula?

Back

The empirical formula is the simplest whole-number ratio of atoms of each element in a compound.

Front

What is a hydrate?

Back

A hydrate is a compound that contains water molecules within its crystal structure.

Front

How do you determine the limiting reactant in a reaction?

Back

To determine the limiting reactant, calculate the moles of each reactant and compare the mole ratios from the balanced equation.

Front

What is the balanced equation for the combustion of hydrocarbons?

Back

The balanced equation for the combustion of hydrocarbons is typically: C_xH_y + O_2 -> CO_2 + H_2O.

Front

What is the significance of the coefficients in a balanced chemical equation?

Back

Coefficients indicate the relative number of moles of each substance involved in the reaction.

Front

How do you convert grams to moles?

Back

To convert grams to moles, divide the mass of the substance by its molar mass.