Duration: 6:40

5 views

0

An acid type indicator, HIn differs in colour from its
P conjugate base \( \left(\operatorname{In}^{-1}\right) \). The human eye is sensitive to

W colour differences only when the ratio \( \left[\operatorname{In}^{-}\right] /[\mathrm{HIn}] \) is greater than 10 or smaller than 0.1 . What should be the minimum change in the \( \mathrm{pH} \) of the solution to observe a complete colour change \( \left(K_{\mathrm{a}}=1.0 \times 10^{-5}\right) \) ?
(1) 0.0
(2) 1.0
(3) 2.0
(4) 5.0
📲PW App Link - https://bit.ly/YTAI_PWAP
🌐PW Website - https://www.pw.live