Stoichiometry Mass to Mass

Front

What is stoichiometry?

Back

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

Front

What is the first step in solving a stoichiometry problem?

Back

Write a Balanced Equation.

Front

What does a balanced equation represent?

Back

A balanced equation represents the conservation of mass, showing that the number of atoms for each element is the same on both sides of the equation.

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 H2SO4?

Back

The molar mass of H2SO4 (sulfuric acid) is approximately 98.08 g/mol.

Front

In the reaction 2Al + 3H2SO4 -> Al2(SO4)3 + 3H2, how many moles of Al are needed to react with 1 mole of H2SO4?

Back

2 moles of Al are needed to react with 3 moles of H2SO4, so 0.67 moles of Al are needed for 1 mole of H2SO4.

Front

What is the relationship between moles and mass in stoichiometry?

Back

The relationship is defined by the molar mass; moles can be converted to mass using the formula: mass = moles × molar mass.

Front

How do you determine the limiting reactant in a chemical reaction?

Back

The limiting reactant is determined by calculating the amount of product each reactant can produce and identifying the one that produces the least amount.

Front

Given the reaction 6 Mg + P4 -> 2 Mg3P2, how many grams of Mg are needed to produce 1089 grams of Mg3P2?

Back

649 grams of Mg are needed to produce 1089 grams of Mg3P2.

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.