You are supplied with five solutions : A, B, C, D and E with pH values as follows:

A = 1.8, B = 7, C = 8.5, D = 13, and E = 5

Classify these solutions as neutral, slightly or strongly acidic and slightly or strongly alkaline.

Which solution would be most likely to liberate hydrogen with:

(a) magnesium powder

(b) powdered zinc metal. Give a word equation for each reaction.

A = Strongly acidic

B = neutral

C = slightly alkaline

D = Strongly alkaline

E = slightly acidic

(a) Solution A (acidic solution)

Solution A (acidic solution) + magnesium powder ⟶ Hydrogen + Mg salt

(b) Solution A (acidic solution)

Solution A (acidic solution) + powdered zinc metal ⟶ Hydrogen + Zn salt