STOICH FUNSHEET
Name _______________________________
Chemical equations:
1. Al + Cl2  AlCl3
2. Mg(ClO)2  MgCl2 + O2
3. FeCl3 + LiOH  Fe(OH)3 + LiCl
4. Na + O2  Na2O
5. KBr + F2  KF + Br2
6. Al + H2SO4  Al2(SO4)3 + H2
7. Cr(OH)3  Cr2O3 + H2O
8. Li + H2O  LiOH + H2
9. Pb(NO3)2 + NaBr  PbBr2 + NaNO3
10. Fe2(CO3)3  Fe2O3 + CO2
11. P + Fe2O3  P4O10 + Fe
12. C4H8 + O2  CO2 + H2O
Date ______________________
Convert the following compounds given mass to moles: (gmd)
a. 235.0 g NaNO3
2.77 mol
b. 130.0 g Al2(SO4)3
0.38 mol
c. 50.0 g Fe(OH)3
0.47 mol
d. 75.0 g Fe2(CO3)3
0.26 mol
e. 196.0 g H2SO4
1.99 mol
Convert the following compounds given moles to grams: (mgm)
a. 2.0 moles of C4H8
112.25 g
b. 1.5 moles of Pb(NO3)2
496.74 g
c. 0.25 moles of Fe2O3
39.92 g
d. 5.0 moles of LiCl
211.95 g
e. 6.1 moles of KBr
725.9 g
In equation 1, what is the mole ratio of
Al to Cl2
2 mol Al/ 3 mol Cl2
Cl2 to Al
3 mol Cl2/ 2 mol Al
Cl2 to AlCl3
3 mol Cl2/ 2 mol AlCl3
Al to AlCl3
2 mol Al/ 2 mol AlCl3
Problems: (refer to your list of equations to answer the following questions)
1. How many moles of AlCl3 can be made from 4.5 mole of Al? (reaction 1)
4.5 mol AlCl3
a. How many moles of Cl2 are needed to produce 3 moles of AlCl3?
4.5 mol Cl2
b. How many moles of Al are needed to react with 7.5 moles of Cl2?
5 mol Cl2
2. In reaction 4, how many moles of O2 are needed to react with 5 moles of Na?
1.25 mol O2
3. In reaction 10, how many moles of CO2 can be produced if 7.5 moles of Fe2O3 are
made?
22.5 mol CO2
4. In reaction 5, how many moles of Br2 are produced from 8 moles of KBr?
4 mol Br2
5. In reaction 12, how many moles of O2 are needed to produce 3.0 moles of CO2?
4.5 mol O2
6. In equation 11, if 5.0 moles of P begin the reaction:
a. How many moles of Fe can be produced?
8.33 mol Fe
b. How many moles of Fe2O3 will react?
4.17 mol Fe2O3
7. In equation 12, if 112.0 grams of C4H8 begin the reaction:
a. How many moles of O2 will be needed to completely react?
b. How many moles of CO2 will be formed?
11.97 mol O2
7.96 mol CO2
8. In equation 8, if 3 moles of Li are used:
a. How many grams of H2 will be formed?
3.03 g H2
b. How many grams of H2O will also react?
54.03 g H2O
9. In equation 5, if 50.0 grams of KBr are used:
a. How many grams of KF can be made?
24.4 g KF
b. How many grams of F2 will be needed to completely react with KBr?
7.98 g F2
II: Mass to Mass
1. Lithium perchlorate decomposes to produce lithium chloride and oxygen gas. How
many mL of oxygen can be produced if 100.0 g of lithium perchlorate decompose at
STP?
4.2 x 10 4 mL O2
2. Chromium (III) carbonate reacts with nitric acid to produce water, chromium (III)
nitrate and carbon dioxide gas at STP. How many L of carbon dioxide gas can be
produced from 25.0 g of chromium (III) carbonate?
5.92 L O2
3. When 0.46 g of antimony III oxide reacts with carbon to produce antimony metal and
carbon monoxide gas, determine the mass of antimony metal produced. 0.384 g Sb
4. How many mL of carbon monoxide must react with oxygen to produce 0.68 L of
carbon dioxide at STP?
672/680 mL CO
5. When hydrogen peroxide decomposes, it produces liquid water and oxygen gas. What
mass of hydrogen peroxide must decompose to produce 0.77g of liquid water?
1.46 g H2O2
6. When lithium nitride reacts with water, lithium hydroxide and ammonia gas (NH3) are
produced. Determine the mass of lithium hydroxide produced when 0.38 g of lithium
nitride reacts with water.
0.79 g LiOH
7. Sodium iodide reacts with chlorine to produce Iodine and sodium chloride in a single
replacement reaction. What mass of sodium chloride is produced from 0.29 g of sodium
iodide?
0.113 g NaCl
III: Limiting Reactant
1.
Identify the limiting reactant when 1.22g of oxygen gas reacts with 1.05g of
hydrogen gas to produce liquid water.
LR= O2
2.
Identify the limiting reactant when 5.87g of magnesium hydroxide reacts with
12.84g of hydrosulfuric acid to produce liquid water and magnesium sulfide.
LR = Mg(OH)2
Identify the limiting reactant when 7.81g of hydrochloric acid reacts with 5.24g of
sodium hydroxide and produces liquid water and sodium chloride. LR= NaOH
3.
4.
Identify the limiting reactant when 43.25g of calcium carbide reacts with 33.71g
of liquid water to produce calcium hydroxide and acetylene (C2H2). LR= CaC2
5.
Identify the limiting reactant when 4.687g of sulfur tetrafluoride reacts with
6.281g of diiodine pentoxide to produce iodine pentafluoride and sulfur dioxide.
LR= SF4
6.
Identify the limiting reactant when 19.9 g of CuO are exposed to 2.02 g of H2 to
produce copper metal and water.
LR= CuO
7.
If 41.6g of dinitrogen tetraoxide reacts with 20.8g of dinitrogen tetrahydride, the
products will be nitrogen gas and water. What mass of water will be produced?
LR= N2H4 23.39 g H2O produced
If 16.8g of carbon monoxide is mixed under high pressure with 1.78g of
hydrogen, CH3OH (methanol) will be produced? How many grams of methanol
will be produced?
LR= H2
14.08 g CH3OH
8.
IV: Percent Yield
Determine the percent yield in the following reactions:
1.
3.74 g of sodium metal reacts with oxygen to produce 5.34g of sodium peroxide.
85.6 %
2.
Potassium metal reacts with 4.28g of oxygen to produce 7.36 of potassium oxide.
29.19%
3.
82.4g of rubidium metal reacts with oxygen to produce 39.7g of rubidium oxide.
44.1%
4.
Cesium metal reacts with 3.4g of oxygen to produce 28.3g of cesium oxide.
47.15%
5.
28.1 of tetraantimony hexoxide reacts with carbon to produce 17.3g of antimony
and carbon monoxide (the other product). 74%
6.
45.9g of sodium bromide reacts with chlorine gas to produce 12.8g of sodium
chloride and bromine gas (other product). 49.1%
7.
15.8g of ammonia gas reacts with oxygen gas to produce 21.8g of nitrogen
monoxide gas and water (other product).
78.39%