Mixed Practice Stoichiometry Problems

Mixed practice Stoichiometry Problems

In the following problems, calculate how much of the indicated product is made. Make sure all equations are written and balanced correctly. Show all your work.

Worksheet 57

1)LiOH + HBrLiBr + H2O

If you start with ten grams of lithium hydroxide, how many grams of lithium bromide will be produced?

If you start with 3 moles of LiOH, how many grams of H2O will be produced?

2)C2H4 + 3 O2 2 CO2 + 2 H2O

If you start with 45 grams of ethylene (C2H4), how many grams of carbon dioxide will be produced?

If you start with 6 mols of O2, how many mols of CO2 will be produced?

3)Mg + 2 NaF MgF2 + 2 Na

If you start with 5.5 grams of Sodium Fluoride, how many grams of Magnesium Fluoride will be produced?

If you start with 16 grams of Mg, how many mols of Na will be produced?

4)2 HCl + Na2SO4 2 NaCl + H2SO4

If you start with 20 grams of hydrochloric acid, how many grams of sulfuric acid will be produced?

If you start with 14 grams of Na2SO4, how many grams of H2SO4 will be produced?

5) 4 NH3 + 5O2 4 NO + 6 H2O

18.9 grams of O2 will produce how many grams of NO?

5.2 moles of NH3 needs how many grams of O2 to produce NO?

6) 2HgO 2Hg + O2

If 20.3 grams of Mercury Oxide decomposes into mercury and oxygen, how many grams of oxygen will be produced?

How many moles of HgO will be used to produce 7.4 grams of Hg?

Mass to Mass Stoichiometry Problems – Answer Key

In the following problems, calculate how much of the indicated product is made. Show all your work.

1)LiOH + HBrLiBr + H2O

If you start with ten grams of lithium hydroxide, how many grams of lithium bromide will be produced? 36.3 grams

If you start with 3 moles of LiOH, how many grams of H2O will be produced? 54.06 g

2)C2H4 + 3 O2 2 CO2 + 2 H2O

If you start with 45 grams of ethylene (C2H4), how many grams of carbon dioxide will be produced? 141.16 grams

If you start with 6 mols of O2, how many mols of CO2 will be produced?

4 mols

3)Mg + 2 NaF MgF2 + 2 Na

If you start with 5.5 grams of sodium fluoride, how many grams of magnesium fluoride will be produced? 4.08 g

If you start with 16 grams of Mg, how many mols of Na will be produced?

30.26 g

4)2 HCl + Na2SO4 2 NaCl + H2SO4

If you start with 20 grams of hydrochloric acid, how many grams of sulfuric acid will be produced? 26.9 grams

If you start with 14 grams of Na2SO4, how many grams of H2SO4 will be produced? 9.67 g

5) a)13.50 g NO

b) 208 g O2

6) a) 1.5 g O2

b) .037 mols HgO