Need help with theoretical yield:

Calculate theoretical yield of Potassium Alum from 1.0000g of Aluminum, assuming aluminum is limiting reagent. First get the NET REACTION by adding up the net ionic equations that represent the four steps in the synthesis:

[1] 2 Al + 2 OH^-1 + 6 HOH -- 2 Al(OH)4^-1 + H2
[2] 2 Al(OH)4^-1 + 2 H^+1 --- 2 Al(OH)3 + 2 HOH

Question

Need help with theoretical yield:

Calculate theoretical yield of Potassium Alum from 1.0000g of Aluminum, assuming aluminum is limiting reagent. First get the NET REACTION by adding up the net ionic equations that represent the four steps in the synthesis:

[1] 2 Al + 2 OH^-1 + 6 HOH --> 2 Al(OH)4^-1 + H2 
[2] 2 Al(OH)4^-1 + 2 H^+1 ---> 2 Al(OH)3 + 2 HOH

jfraser · Answer

adding two reactions together is a lot like adding 2 algebraic equations together. The reactants from both stay reactants, and the products from both stay as products. When there are "like terms" on opposite sides, they cancel, when there are "like terms" on the same side, they combine