Question

pH paper strips have imparted purple and dark violet colors to two solutions A and B. Which is more basic?

Answer 1

• pH is the measure of the concentration of ${\mathrm{H}}^{+}$ions and expresses the acidic or basic nature of the solution.
• pH scale imparts different color depending on its pH value:

pH	Color
<3	red
3-6	orange
7	green
8-11	blue
11-13	purple
14	violet

• Solution B is more basic in nature since the paper strip which imparts purple indicates a level of 11 and dark violet indicates the level of 14. Since the higher the pH level, the more basic the strength of a solution is, therefore, solution B is more basic.

Hence, solution B is more basic.