Question

A given white crystalline salt was tested as follows:

It dissolved in water and the resulting solution of the salt turned blue litmus red. What conclusions can be drawn for the observation?

Answer 1

Since the salt solution turned blue litmus red, the salt may be an acid.

Answer 2

White crystalline salt must be salt of Pb²⁺, Zn²⁺, Ca²⁺, Na⁺, K⁺.