Question

What is the pH of Milk of Lime?

• A. More than 7
• B. Less than 7
• C. Any value between 0 to 14
• D. Equal to 7

Answer 1

The correct option is A

More than 7

When excess calcium hydroxide is added to limewater, a suspension of calcium hydroxide particles is formed, which gives the solution a milky colour. The common name is, therefore, milk of lime.

If the pH value of a given solution is more than 7 then given solution is a base. If the pH value of the solution is less than 7 then the given solution is an acid. If the pH value of the solution is equal to 7 then the solution is neutral. Milk of lime is an alkali solution of $Ca(OH{)}_2$, therefore, the pH value of milk of lime will be greater than 7.