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An acid type indicator Hin differ in col...

An acid type indicator Hin differ in colour from its conjugate base (In^-) The human eye is sensitive to the colour of differences only when the ratio [In^-]/[HIn] is greater than 10 or smaller than 0.1. What should be the minimum change in the PH of the solution to observe a complete colour change` (K_a= 1 xx 10^(-5))`?

A

4

B

2

C

6

D

1

Text Solution

Verified by Experts

The correct Answer is:
B
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