How to write balanced net ionic equations?

Write balanced chemical or net ionic equations for the following:?

• Write balanced chemical or net ionic equations for the following: a. aluminum plus potassium hydroxide plus water, yielding K[Al(OH)4] and hydrogen gas b. hydrogen ions and [Al(OH)4] –, yielding aluminum hydroxide and water c. aluminum hydroxide and hydrogen ions, yielding [Al(H2O)6]3+ d. the formation of alum from potassium ions, sulfate ions, [Al(H2O)6]3+, and water

• Answer:

  Here are the first two, it's a start. a) Al(s) + KOH + 3H2O → K[Al(OH)4] + 3H2 b) H+ + [Al(OH)4]- → Al(OH)3 + H2O