Entry Task: March 8th FridayEntry task question:

2AgCl + Mg MgCl2 + 2Ag

Question:How many grams of silver can be produced if 150

grams of magnesium reacts with excess AgCl?

You have ~10 minutes

Agenda:

• TURN IN ALL STOICH LAB!!- NOW!!!– OR it will be considered LATE!!

• Break out periodic tables and calculators

Stoichiometry – gram-gram

• Clear off Desks!• QUIETLY work through the first problem.• After ~10-15 minutes we will check answers• If you get done sooner- move on

Iron III sulfate reacts with potassium hydroxide to create potassium sulfate and iron III hydroxide

___Fe2(SO4)3 + ___KOH ___K2SO4 + ___Fe(OH)3236

___Fe2(SO4)3 + ___KOH ___K2SO4 + ___Fe(OH)3236

a. How many grams of potassium hydroxide were used to create 50.9 grams of iron III hydroxide?

50.9 grams Fe(OH)3

g of KOH

106.9 g of Fe(OH)3

1 mole of Fe(OH)3

56.10 g of KOH

1 mole of KOH2 mole of Fe(OH)3

6 mole of KOH

50.9 X 6 X 56.10

106.9 X 2

17132.9

213.8

80.1 g of KOH

___Fe2(SO4)3 + ___KOH ___K2SO4 + ___Fe(OH)3236

b. How many grams of iron III sulfate were used to create 155 grams of potassium sulfate?

155 grams K2SO4

g of Fe2(SO4)3

174.3 g of K2SO4

1 mole of K2SO4

399.873 g of Fe2(SO4)3

1 mole of Fe2(SO4)3

3 mole of K2SO4

1 mole of Fe2(SO4)3

155 X 1 X 399.873

174.3 X 3

61980.3

522.9

119 g of Fe2(SO4)3

___Fe2(SO4)3 + ___KOH ___K2SO4 + ___Fe(OH)3236

c. How many grams of potassium sulfate were produced if 35.0 grams of potassium hydroxide were used?

35.0 grams KOH g of K2SO4

56.10 g of KOH

1 mole of KOH

174.3 g of K2SO4

1 mole of K2SO4

6 mole of KOH

3 mole of K2SO4

35.0 X 3 X 174.3

56.10 X 6

18301.5

336.6

54.4 g of K2SO4

___Fe2(SO4)3 + ___KOH ___K2SO4 + ___Fe(OH)3236

d. How many grams of iron III hydroxide were produced if 25.0 grams iron III sulfate were used?

25.0 grams Fe2(SO4)3

g of Fe(OH)3

399.87 g of Fe2(SO4)3

1 mole of Fe2(SO4)3

106.9 g of Fe(OH)3

1 mole of Fe(OH)3

1 mole of Fe2(SO4)3

2 mole of Fe(OH)3

25.0 X 2 X 106.9

399.87

534.5

399.87

13.4 g of Fe(OH)3

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