[elementwiz123]

hello in class we are attempting to identify four unknown solutions using any methods we can think of that are available in a high school lab. so far we have considered flame testing, litmus, pH concentration and conductivity. does anyone have any ideas for other tests? also does anyone have a way to tell what the solution is?

P.S there is no other data given such as how much of the compound is in the solution or the molarity

thanks

[Borek]

Precipitation.

[Xenonman]

I had once a sort of paper-only test. Pieces of Ag(s), Mg(s) and other stuff were placed in solutions of Ag⁺, Mg²⁺ and the same ions. The paper piece mentioned the relative reduction potentials and the results of placing each metal in each solution.
I have no idea how useful that is IRL.