Question

a particular indicator that is yellow in acid, colorless in neutral ph and blue in base. its color in a solution of ph 11.5 will be ____and in solution of ph 2.5 will be __________, respectively, 1) yellow and yellow 2) yellow and colorless 3) blue and colorless 4) blue and yellow

Explanation:

Step1: Analyze pH 11.5 solution

A pH of 11.5 is greater than 7, so the solution is basic (base). The indicator is blue in base, so at pH 11.5, the color is blue.

Step2: Analyze pH 2.5 solution

A pH of 2.5 is less than 7, so the solution is acidic. The indicator is yellow in acid, so at pH 2.5, the color is yellow.

Answer:

1. Blue and Yellow