8/3/2019 Worksheet - Stoichiometry Review

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Name

Stoichiometry Final Review

Instructions: solve the following problems using blank sheets. This homework must be turned in bynext Wednesday.

1. Complete the following table.

Element/Compound Grams Moles Atoms/Molecules

C 15 g

I 2

Ni2O3 1.36

HNO3 2.39x1023

2. Solve the following problems.

PART I: Mol mol problems.

a. Consider the following equation:

____ AlCl3 ____ Al + ____ Cl2

How many moles of Aluminum can be produced using 7 mol of AlCl3?

b. Consider the following equation:

____ Mg + ____ H2O ____ Mg(OH)2 + ____ H2

How many moles of H2 can be produced using 3.4 moles of water?

c. How many moles of P2O5 are produced using 2.6 moles of Oxygen?

____ P + ____ O2 ____ P2O5

PART II. Mol-gram problems

d. How many grams of Fe2O3 can be produced using 12 mol of Fe?

8/3/2019 Worksheet - Stoichiometry Review

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____ Fe + ____ O2 ____ Fe2O3

e. How many grams of NH3 can be produced using 13 mol of N2?

____ N2 + ____ H2 ____ NH3

f. How many grams of HgO are needed to produce 3 mol of Hg?

____ HgO ____ Hg + ____ O2

PART III. Gram-gram problems

g. Consider the following reaction:

____ C2H4 + ____ O2 _____CO2 +_____H2 O

How many grams of CO2 can be produced from 30 grams of C2H4?

h. Consider this equation:

____ Na + ____ Cl2 _____NaCl

How many grams of Na are needed to produce 1000 grams of NaCl?

i. How many grams of CaCO3 are needed to produce 200,000 kilograms of CaO?

____ CaCO3 ____ CaO + ____ CO2

PART IV. Limiting reactant

j. Consider the following chemical equation.

____ Na + ____ Cl2 _____NaCl

If 2 moles of Na and 1 mol of Cl2 are combined:

1. Whats the limiting reactant?

2. How many moles of NaCl can be produced?

k. Consider the following reaction:

8/3/2019 Worksheet - Stoichiometry Review

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____ H2SO4 + ____Ca(OH)2 ______CaSO4 + ____H2O

If 1.3 moles of H2SO4 and 3.4 Ca(OH)2 are combined:

1. Whats the limiting reactant.

2. How many grams of CaSO4 are produced?

l. Consider the reaction:

____ CH4 + O2 _____CO2 + _____H2O

If 30 grams of CH4 are combined with 43 grams of O2

1. Whats the limiting reactant?

2. How many moles of Water can be produced

m. Consider the reaction:

____ C6H12O6 + _____ O2 _____CO2 + _____H2O

If 20 grams of C6H12O6 are combined with 20 grams of oxygen gas. How many grams of Water

are produced?

Solutions

1. Whats the weight percentage of 1.75 g NaCl dissolved in 5 g of Water?

2. How many grams of NaCl exist in a 20% solution, whose weight is 100g?

3. Whats the molarity of 4 moles of NaCl dissolved in 3L of Water?

4. How many moles of KCl exist in a 0.75 M solution, whose volume is 5L?

5. Whats the volume of a solution in liters with 5 mol of Zn (OH)2 and whose concentration is 1.2

M?

6. Whats the concentration in ppm of 2 milligrams of Oxygen present in 1 kilogram of a sample of

gas?

7. The volume of a solution is 270ml. Whats the normality of this solution if 12.3 g H2SO4 areadded?

8. The volume of a solution is 30ml. Whats the normality of this solution if 5 g Al (OH)3 are

added?