Question

GIVEN:

VOLUME OF KOH USED: 10 mL OF 1.5 M KOH

VOLUME H2SO4 USED: 5 mL OF 4.5 M K2SO4

MASS OF AL = 0.2147 grams

MASS OF ALUM = 2.67 grams

DECOMPOSITION RANGE (initial temp to final temp) : (87 degrees celsius - 93 degrees celsius)

1. Prove that aluminum is the limiting reagent in the synthesis of alum.

a. Calculate the moles of aluminum used in the reaction and the moles of alum that could be produced from this amount.

b. Calculate the moles of potassium hydroxide used in the synthesis of alum and the moles of alum that could be produced from this amount.

c. Calculate the moles of sulfuric acid used in the synthesis of alum and the moles of alum that could be produced from this amount.

2. Calculate the theoretical yield of alum in grams, based on the limiting reagent

3. Calculate the percent yield for the reaction.

Answer 1