What should you when you measure 4M H_2SO_4 and add it to the liltrate in What p

Question

What should you when you measure 4M H_2SO_4 and add it to the liltrate in What precautions should you take when you wash the alum with in Step 24? Explain the following events, which happen when 3M KOH solution is added to aluminum foil. What gas is released? Why is the gas released slowly at first, but more rapidly as the reaction proceeds? Name three commercial uses of alum. If 0.15 g of aluminum was dissolved by adding 3M KOH solution, and the solution was with 4M H_2SO_4, what mass of should have formed, theoretically? If only 2.18g of alum were obtained as product from 0.15 g of Al, what would be the percent yield of the systhesis?

Explanation / Answer

Cannot answer Q1 as steps are not given.

Q2 . When 3M KOH react with Al, the following reaction takes place.

2 Al + 2 KOH + 6 H2O = 2 K[Al(OH)4] + 3 H2

So, hydrogen gas is released.

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