Question

When calcium metal is placed in water a vigorous single replacement rection occurs, releasing hydrogen gas. What will happen to the pH of the solution that forms as this chemical reaction proceeds

Answer 1

The pH of the solution increases

Step-by-step explanation:

One of the properties of metals is that they react with water to yield hydrogen gas and the hydroxide of the metal.

Calcium is a metal in group two of the periodic table and also undergoes such reaction.

The equation of the reaction is;

Ca(s) + 2H2O(l) -----> Ca(OH)2(aq) + H2(g)

Since Ca(OH)2 is alkaline, the pH of the solution increases.