Stoichiometry

1
Stoichiometry

• Ch. 9

2
Reaction Stoichiometry

• Involves the mass relationships between reactants
  and products in a chemical reaction

3
Mole Ratio

• T3SHP2 3T S H
  2P

2Al2O3 (l) 4Al(s) 3O2(g)
4
Mole Ratio
5
Zn(s) 2HCl(aq) ZnCl2(aq) H2(g)
MOLE
HCl
Zn
H2
6
Calculations

• CO2(g) 2LiOH Li2CO3 H2O(l)
• How many moles of lithium hydroxide are required
  to react with 20 moles of CO2?

7
6CO2(g) 6H2O(l) C6H12O6 6O2(g)

• What mass of glucose is produced when 3.00 moles
  of water react with carbon dioxide?
• What mass of carbon dioxide is needed to react
  with 3.00 moles of water?

8
NH3(g) O2(g)
NO(g) H20(g)

• If 824 g of ammonia are reacted with excess
  oxygen, how many moles of NO are formed?
• How many moles of water are formed?

9
Sn(s) 2HF(g) SnF2(s) H2(g)

• How many grams of Tin(II) Fluoride are produced
  from 30.00 g of HF with excess Sn?
• How much tin would be used?

10
Limiting Reactants

• Which one do you run out of first?
• How much can you make?
• What do you have left?

11
3Fe(s) 4H2O(g) Fe3O4(s) 4H2(g)

• 1. 36.0 g of water mixed with 167 g of iron,
  which is the limiting reactant?
• What mass of iron oxide is produced?
• What is the mass of the excess reactant?

12
Percent Yield

• Yield Actual Yield X 100
• Theoretical Yield