Chemistry
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Stoichiometry
Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "elem…
Question

Add all four reaction steps together to get the overall reaction. Remember to cross out anything that occurs on both the reactant and product sides and to combine like terms. 

1. 2 Al(s) + 2 KOH (aq) + 6 H2O (l) → 2 KAl(OH)4(aq) + 3 H2(g) 

2. 2 KAl(OH)4(aq) + H2SO4 (aq) → 2 Al(OH)3(s) + 2 H2O (l) + K2SO4(aq) 

3. 2 Al(OH)3(s) + 3 H2SO4 (aq) → Al2(SO4)3(aq) + 6 H2O (l)

4. Al2(SO4)3(aq) + K2SO4(aq) + 24 H2O (l) →2 (KAl(SO4)2∙12H2O) (s) 

 

For each reactant except water, calculate the number of moles you added (use the stoichiometry of the balanced equation to identify the limiting reactant. 

Al: ____ moles 

KOH: ____ moles 

H2SO4: ____ moles 

mass of aluminum: 0.49g 

the volume of 1.4 M KOH: 25.0 mL 

the volume of 9 M H2SO4: 10.2 mL 

mass of watch glass: 50.28 g

mass of watch glass plus alum: 58.17g 

 

 

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