Adding hydrogen ions to a solution will make the solution more

What produces wave a)sound b) heats c)transfer of energy d)vibrations

Does the number of ions in solution increase, decrease, or remain constant? it continuously decreases. it continuously increases. it decreases at first, then increases. it increases at first, then decreases.

Apropane torch is lit inside a hot air balloon during preflight preparations to inflate the balloon. which condition of the gas remains constant