Stoichiometry Practice

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 a balanced chemical equation?

Back

A balanced chemical equation has equal numbers of each type of atom on both sides of the equation, ensuring the law of conservation of mass is followed.

Front

How do you determine the number of moles from grams?

Back

To determine the number of moles from grams, use the formula: Moles = Mass (g) / Molar Mass (g/mol).

Front

What is the molar mass of Ca(OH)₂?

Back

The molar mass of Ca(OH)₂ is approximately 74.09 g/mol.

Front

In the reaction CaC₂ + H₂O → C₂H₂ + Ca(OH)₂, how many moles of Ca(OH)₂ are produced from 3.20 moles of CaC₂?

Back

2 moles of Ca(OH)₂ are produced for every 1 mole of CaC₂, so 3.20 moles of CaC₂ produce 6.40 moles of Ca(OH)₂.

Front

What is the mole ratio of H₂O to Ca(OH)₂ in the reaction CaC₂ + H₂O → C₂H₂ + Ca(OH)₂?

Back

The mole ratio of H₂O to Ca(OH)₂ is 1:1.

Front

How do you balance the equation C₂H₂ + O₂ → CO₂ + H₂O?

Back

The balanced equation is 2 C₂H₂ + 5 O₂ → 4 CO₂ + 2 H₂O.

Front

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

Back

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

Front

How many grams of Ca(OH)₂ are produced from 3.20 moles of CaC₂?

Back

237 grams of Ca(OH)₂ are produced from 3.20 moles of CaC₂.

Front

What is the relationship between moles of Mg and moles of HCl in the reaction Mg + 2 HCl → MgCl₂ + H₂?

Back

For every 1 mole of Mg, 2 moles of HCl are consumed.