Stoichiometry

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

True or False: You must convert grams to moles to perform stoichiometric calculations.

Back

True

Front

What is the purpose of identifying the limiting reactant in a chemical reaction?

Back

The limiting reactant determines the maximum amount of product that can be formed in a chemical reaction.

Front

How do you calculate the percent yield of a reaction?

Back

Percent yield is calculated using the formula: (actual yield / theoretical yield) x 100%.

Front

What is the theoretical yield in a chemical reaction?

Back

The theoretical yield is the maximum amount of product that can be produced from a given amount of reactants, based on stoichiometric calculations.

Front

In the reaction 2 Al + 3 Cl2 -> 2 AlCl3, if you have 2 moles of Al and 2 moles of Cl2, which is the limiting reactant?

Back

Cl2 is the limiting reactant.

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 (in grams) by its molar mass (in g/mol).

Front

What is the molar mass of SO2?

Back

The molar mass of SO2 (sulfur dioxide) is approximately 64.07 g/mol.

Front

What is the molar mass of PCl5?

Back

The molar mass of PCl5 (phosphorus pentachloride) is approximately 208.24 g/mol.