Which ones are redox, precipitation, and acid-base reactions?
Well a precipitation reaction gives you water as one of the products. Number 4 here is an example An acid base reaction gives you a salt and water as the products. This is also number 4 Redox reactions are reactions that involve exchanging electrons. One molecule is reduced (has electrons added to it) and the other molecule in the pair is oxidized (has electrons taken away from it) I believe all the other reactions here are redox reactions.