Remembering: Molarity and Stoichiometry

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RememberingMolarity and Stoichiometry

• Because we know you brain is getting full!!!

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• Molarity moles (Molar) or (M)
  litres

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• Calculate the molarity of 18 moles of LiBr
• dissolved in 6.0 L.
• 18 moles
• 6.0 L
• 3.0 M

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• How many moles of AlF3 are there in 20.5 L of a
• 0.172 M solution?

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• How many moles of AlF3 are there in 20.5 L of a
• 0.172 M solution?
• 20.5 L x

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• How many moles of AlF3 are there in 20.5 L of a
• 0.172 M solution?
• 20.5 L x
• 1 L

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• How many moles of AlF3 are there in 20.5 L of a
• 0.172 M solution?
• 20.5 L x 0.172 mole
• 1 L

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• How many moles of AlF3 are there in 20.5 L of a
• 0.172 M solution?
• 20.5 L x 0.172 mole 3.53 moles
• 1 L

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• STOICHIOMETRY

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• Stoichiometry is where you use the balancing
  coefficients to create a ratio between two
  different compounds in a chemical reaction.

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1. How many grams Fe2O3 of are required to
produce 105 g of Fe? 2Fe2O3 3C ? 4Fe 3CO2

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1. How many grams Fe2O3 of are required to
produce 105 g of Fe? 2Fe2O3 3C ? 4Fe 3CO2
?g 105 g

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1. How many grams Fe2O3 of are required to
produce 105 g of Fe? 2Fe2O3 3C ? 4Fe 3CO2
?g 105 g
2
4

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1. How many grams Fe2O3 of are required to
produce 105 g of Fe? 2Fe2O3 3C ? 4Fe 3CO2
?g 105 g

• 105 g Fe

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1. How many grams Fe2O3 of are required to
produce 105 g of Fe? 2Fe2O3 3C ? 4Fe 3CO2
?g 105 g

• 105 g Fe x 1 mole
• 55.8 g

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1. How many grams Fe2O3 of are required to
produce 105 g of Fe? 2Fe2O3 3C ? 4Fe 3CO2
?g 105 g

• 105 g Fe x 1 mole x 2 mole Fe2O
• 55.8 g 4 mole Fe

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1. How many grams Fe2O3 of are required to
produce 105 g of Fe? 2Fe2O3 3C ? 4Fe 3CO2
?g 105 g

• 105 g Fe x 1 mole x 2 mole Fe2O x 159.6
  g
• 55.8 g 4 mole Fe 1 mole

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1. How many grams Fe2O3 of are required to
produce 105 g of Fe? 2Fe2O3 3C ? 4Fe 3CO2
?g 105 g

• 105 g Fe x 1 mole x 2 mole Fe2O x 159.6
  g 150. g
• 55.8 g 4 mole Fe 1 mole

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• How many grams of sodium chloride are produced
  when
• you react 65.2 g of sodium carbonate?
• 1 Na2CO3 2 HCl ? 2 NaCl
  1 H2O 1 CO2

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• How many grams of sodium chloride are produced
  when
• you react 65.2 g of sodium carbonate?
• 1 Na2CO3 2 HCl ? 2 NaCl
  1 H2O 1 CO2
• 65.2 g ? g

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• How many grams of sodium chloride are produced
  when
• you react 65.2 g of sodium carbonate?
• 1 Na2CO3 2 HCl ? 2 NaCl
  1 H2O 1 CO2
• 65.2 g ? g
• 65.2 g x Na2CO3

2
1
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• How many grams of sodium chloride are produced
  when
• you react 65.2 g of sodium carbonate?
• 1 Na2CO3 2 HCl ? 2 NaCl
  1 H2O 1 CO2
• 65.2 g ? g
• 65.2 g x Na2CO3 x 1 mol Na2CO3
• 106.0 g Na2CO3
  

2
1
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• How many grams of sodium chloride are produced
  when
• you react 65.2 g of sodium carbonate?
• 1 Na2CO3 2 HCl ? 2 NaCl
  1 H2O 1 CO2
• 65.2 g ? g
• 65.2 g x Na2CO3 x 1 mol Na2CO3 x 2 mol
  NaCl
• 106.0 g Na2CO3
  1 mol Na2CO3

2
1
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• How many grams of sodium chloride are produced
  when
• you react 65.2 g of sodium carbonate?
• 1 Na2CO3 2 HCl ? 2 NaCl
  1 H2O 1 CO2
• 65.2 g ? g
• 65.2 g x Na2CO3 x 1 mol Na2CO3 x 2 mol
  NaCl x 58.5 g NaCl
• 106.0 g Na2CO3
  1 mol Na2CO3 1 mol NaCl

2
1
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• How many grams of sodium chloride are produced
  when
• you react 65.2 g of sodium carbonate?
• 1 Na2CO3 2 HCl ? 2 NaCl
  1 H2O 1 CO2
• 65.2 g ? g
• 65.2 g x Na2CO3 x 1 mol Na2CO3 x 2 mol
  NaCl x 58.5 g NaCl 72.0 g
• 106.0 g Na2CO3
  1 mol Na2CO3 1 mol NaCl

2
1
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• 30.2 L of HCl gas (as STP) is dissolved in 0.500
  L of water to produce an acid
• solution. What volume of 0.200 M Ba(OH)2 will
  neutralize this solution?
• 2 HCl 1 Ba(OH)2 ? 2 H2O 1
  BaCl2

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• 30.2 L of HCl gas (as STP) is dissolved in 0.500
  L of water to produce an acid
• solution. What volume of 0.200 M Ba(OH)2 will
  neutralize this solution?
• 2 HCl 1 Ba(OH)2 ? 2 H2O 1
  BaCl2
• 30.2 L ? L
• 30.2 L HCl

1
2
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• 30.2 L of HCl gas (as STP) is dissolved in 0.500
  L of water to produce an acid
• solution. What volume of 0.200 M Ba(OH)2 will
  neutralize this solution?
• 2 HCl 1 Ba(OH)2 ? 2 H2O 1
  BaCl2
• 30.2 L ? L
• 30.2 L HCl x 1 mol HCl
  22.4 L
  

1
2
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• 30.2 L of HCl gas (as STP) is dissolved in 0.500
  L of water to produce an acid
• solution. What volume of 0.200 M Ba(OH)2 will
  neutralize this solution?
• 2 HCl 1 Ba(OH)2 ? 2 H2O 1
  BaCl2
• 30.2 L ? L
• 30.2 L HCl x 1 mol HCl x 1 mol Ba(OH)2
  22.4
  L 2 mol HCl

1
2
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• 30.2 L of HCl gas (as STP) is dissolved in 0.500
  L of water to produce an acid
• solution. What volume of 0.200 M Ba(OH)2 will
  neutralize this solution?
• 2 HCl 1 Ba(OH)2 ? 2 H2O 1
  BaCl2
• 30.2 L ? L
• 30.2 L HCl x 1 mol HCl x 1 mol Ba(OH)2 x
  1 L Ba(OH)2 22.4 L 2
  mol HCl 0.200 mol Ba(OH)2

1
2
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• 30.2 L of HCl gas (as STP) is dissolved in 0.500
  L of water to produce an acid
• solution. What volume of 0.200 M Ba(OH)2 will
  neutralize this solution?
• 2 HCl 1 Ba(OH)2 ? 2 H2O 1
  BaCl2
• 30.2 L ? L
• 30.2 L HCl x 1 mol HCl x 1 mol Ba(OH)2 x
  1 L Ba(OH)2 3.37 L 22.4 L
  2 mol HCl 0.200 mol Ba(OH)2

1
2
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• 250. mL of water is added to 100.0 mL of 0.200 M
  H2SO4. What volume of
• 0.300 M KOH will neutralize it?
• 1 H2SO4 2 KOH ? 2 HOH
  1 K2SO4

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• 250. mL of water is added to 100.0 mL of 0.200 M
  H2SO4. What volume of
• 0.300 M KOH will neutralize it?
• 1 H2SO4 2 KOH ? 2 HOH
  1 K2SO4
• 0.100 L ? L

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• 250. mL of water is added to 100.0 mL of 0.200 M
  H2SO4. What volume of
• 0.300 M KOH will neutralize it?
• 1 H2SO4 2 KOH ? 2 HOH
  1 K2SO4
• 0.100 L ? L
• 0.1000 L H2SO4

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• 250. mL of water is added to 100.0 mL of 0.200 M
  H2SO4. What volume of
• 0.300 M KOH will neutralize it?
• 1 H2SO4 2 KOH ? 2 HOH
  1 K2SO4
• 0.100 L ? L
• 0.1000 L H2SO4 x 0.200 mol H2SO4
• 1L

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• 250. mL of water is added to 100.0 mL of 0.200 M
  H2SO4. What volume of
• 0.300 M KOH will neutralize it?
• 1 H2SO4 2 KOH ? 2 HOH
  1 K2SO4
• 0.100 L ? L
• 0.1000 L H2SO4 x 0.200 mol H2SO4 x 2 mol
  KOH
• 1L 1 mol H2SO4

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• 250. mL of water is added to 100.0 mL of 0.200 M
  H2SO4. What volume of
• 0.300 M KOH will neutralize it?
• 1 H2SO4 2 KOH ? 2 HOH
  1 K2SO4
• 0.100 L ? L
• 0.1000 L H2SO4 x 0.200 mol H2SO4 x 2 mol
  KOH x 1 L KOH
• 1L 1 mol H2SO4
  0.300 mol KOH

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• 250. mL of water is added to 100.0 mL of 0.200 M
  H2SO4. What volume of
• 0.300 M KOH will neutralize it?
• 1 H2SO4 2 KOH ? 2 HOH
  1 K2SO4
• 0.100 L ? L
• 0.1000 L H2SO4 x 0.200 mol H2SO4 x 2 mol
  KOH x 1 L KOH
• 1L 1 mol H2SO4
  0.300 mol KOH
• 0.133 L of KOH

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Homework Worksheet 4 (in Molarity Unit)