Warm Up 5.6: Mg 2HCl ? MgCl2 H2

1

• Warm Up 5.6 Mg 2HCl ? MgCl2 H2
• What volume of hydrogen gas at STP will be
  produced from each reactant when 50g of magnesium
  reacts with 75g of hydrochloric acid? ( Hint 2
  separate problems/grids)
•  
• 50 g
• Mg
  
• 75g
• HCl

2

• Warm Up 5.6 Mg 2HCl ? MgCl2 H2
• What volume of hydrogen gas at STP will be
  produced from each reactant when 50g of magnesium
  reacts with 75g of hydrochloric acid? ( Hint 2
  separate problems/grids)
•  
• 50 g
• Mg
  
  
• 75g
• HCl

3
How many grids do you need?

• 1 number in the problem 1 stoich
• 2 numbers in the problem 2 stoich

4
How many stools were made?
How many extras were there?
5

• Conclusion
• . What determined how many stools were made? the
  tops of stool
• .What was the extra? legs
• 3. Limiting Reactant is determines how much is
  made used up completely forms the smallest
  amount
• Excess Reactant is extra not completely used
  up in rxn produces the biggest amount

6

• You have 18 car bodies and 43 tires. How many
  cars could you build? What is the limiting and
  excess reactant?
• You have 23 pieces of bread, 18 pieces of ham,
  and 29 pieces of cheese. How many ham and cheese
  sandwiches could you make? What is the limiting
  and excess reactant?

7

• You need 20 mL of chocolate syrup and 250 mL of
  milk to make one glass of chocolate milk. If you
  have 433mL of chocolate syrup and 2987 mL of
  milk, how many glasses of chocolate milk can you
  make? What is the limiting and excess reactant?

8

• Ex. 1 2Na(s) Cl2(g) ?
  2NaCl(s)
• 1) A 6.70 mol Na 2) A 3.2 mol
  Cl2
• A ? mol NaCl A ? mol
  NaCl

9

• Ex. 1 2Na(s) Cl2(g) ?
  2NaCl(s)
• 1) A 6.70 mol Na 2) A 3.2 mol
  Cl2
• A ? mol NaCl A ? mol
  NaCl

10

• Which number is smaller?
• Which reactant limits the amount of product
  produced?
•  
• What is the max amount of product produced?
•  
• You want to make cherry-grape koolaid, you have 1
  packet of cherry and 2 packets of grape, how many
  pitchers of cherry-grape koolaid can be made?

11

• Which number is smaller? 6.4 mole NaCl
• Which reactant limits the amount of product
  produced?
• chlorine
• What is the max amount of product produced?
•   6.4 mole NaCl
• You want to make cherry-grape koolaid, you have 1
  packet of cherry and 2 packets of grape, how many
  pitchers of cherry-grape koolaid can be made?
• 1 pitcher of cherry-grape

12

• Definitions
• Limiting Reactant/Reagent Limits/determines the
  amt of product completely used up in rxn
  smaller formed
• Excess Reactant/Reagent not completely
  used up in rxn BIGGER formed extra

13

• Ex. 2 C2H4(g) 3O2 (g) ? 2CO2 (g) 2H2O
• If 2.7 mol of C2H4 is reacted with 6.3 mol of O2,
  what is the max amount of water in moles that can
  be produced? Identify the limiting and excess
  reactants.

14

• Ex. 3 2Cu (s) S (s) ? Cu2S (s)
• If eighty grams of copper is reacted with
  twenty-five grams of sulfur, how much product can
  be produced in grams? Identify the limiting and
  excess reactants.

15

• Ex. 3 2Cu (s) S (s) ? Cu2S (s)
• If eighty grams of copper is reacted with
  twenty-five grams of sulfur, how much product can
  be produced in grams? Identify the limiting and
  excess reactants.

16

• Definitions
• Theoretical Yield MAX amt of product that
  can be produced ? paper-pencil
• Actual Yield amt of product that actually
  produced ? done in lab

17

• Percent Yield
• Yield (Actual Yield/ Theoretical Yield )?
  100

18

• Ex. 4 CaCO3 (s) ? CaO (s) CO2 (g)
• What is the theoretical yield of calcium oxide if
  24.8 grams of calcium carbonate is heated?
• What is the percent yield if 13.1 g calcium
  oxide is produced in lab?