Question

Do you think all metal salts can be prepared by adding the metal to an acid? Explain.

Answer 1

No, because when metal react with acid it displace hydrogen. So, I think metal must be more reactive than Hydrogen.

Answer 2

no! not all metals salts can be prepared by adding metal to an acid!!

the reaction of formation of metal salts from acid is carried out by the displacement
of H from its salt solution, by metal.
For this to happen, the metal must be more electro positive than the H .
But unfortunately, not all metals are more electro positive than H.
many transition metals like platinum, gold, etc are less electro positive than H.
So, those transition metals can't displace H and therefore its salt can't be prepared by adding acid.

hope this helps, if you have any doubt, ask me