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 balanced equations.

Front

What is the first step in solving a stoichiometry problem?

Back

Write a Balanced Equation.

Front

What is a limiting reagent?

Back

A limiting reagent is the reactant that is completely consumed in a chemical reaction, limiting the amount of product formed.

Front

How do you identify the limiting reagent in a reaction?

Back

To identify the limiting reagent, compare the mole ratio of the reactants used in the balanced equation to the moles available.

Front

What is an excess reactant?

Back

An excess reactant is a substance that is not completely used up in a chemical reaction.

Front

What is the mole ratio in stoichiometry?

Back

The mole ratio is the ratio of moles of one substance to the moles of another substance in a balanced chemical equation.

Front

How do you convert grams to moles?

Back

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

Front

What is the molar mass of CH4 (methane)?

Back

The molar mass of CH4 is approximately 16.04 g/mol.

Front

Given the reaction CH4 + 2 O2 → CO2 + 2 H2O, how many moles of water are produced from 1 mole of CH4?

Back

2 moles of water are produced.

Front

What is the significance of a balanced equation in stoichiometry?

Back

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