I couldnt understand it.

An indicator changes from blue to colourless at pH=10.5 as acid is added.At this pH the ratio of acid top salt(conjugate base) is 0.1 i.e [HIn]/[In-]=0.1.Estimate Ka

4 Answers

1
gagar.iitk ·

Ka=10-9.5
= 3.16*10-10

24
eureka123 ·

plzzzz give the soln too .....ur answeer is correct...........plzzzzz

1
gagar.iitk ·

[HIn]/[In-]=0.1 so we can say that [In-]/[HIn]=10
H+=10-10.5given

Ka=(H+*[In-])/[HIn] put the values and get the ans

24
eureka123 ·

thanxx

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