Answer to Question #244109 in General Chemistry for Hello

Question

What are the steps to find the overall balanced reaction for the production of alum from aluminum in the Aluminum Recycling Experiment.

The answer is :

2 Al(s) + 2 KOH(aq) + 4 H2SO4(aq) + 22 H2O(l) → 2 KA1(SO4)2•12H2O(s) + 3 H2(g)

I know the answer but I need to show my work and all of the steps, I really need help.

Answer 1

The qualitative test for sulfate uses the insolubility of barium sulfate (BaSO4). When an aqueous solution of a barium salt (usually BaCl2) is mixed with an aqueous solution containing sulfate, a white precipitate of insoluble BaSO4 forms according to the net ionic equation: Ba2+ (aq) + SO42- (aq) → BaSO4 (s).