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4. In the final reaction, aluminum sulfate reacts with potassium sulfate to generate alum. The bal- anced chemical equation i
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4) Reaction type : precipitation.

Observation : White solid start precipitating out.

5) Balanced equation :

Al(s) + KOH(aq) + 2H2SO4(aq) + 11H2O(l) \rightarrow KAl(SO4)2.12H2O(s) + 3/2H2(g)

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