
Concept explainers
Interpretation: The equilibrium constant for the dissociation of methyl violet needs to be explained.
Concept Introduction: The color change for an indicator occurs when the H+ ion concentration is equal to K. This happens when the concentration of HIn molecules is equal to the concentration of the In− ions.

Answer to Problem 8E
Equilibrium constant for the dissociation of methyl violet is 10−1 .
Explanation of Solution
Color changes for an indicator is occurs if H+ ion concentration is equal to constant K.
pH is the negative logarithm of H+ ion concentration. Given, pH is 1. Therefore,
pH=1−log[H+]=1[H+]=10−1
Since, [H+]=K
Therefore, K value is 10−1 .
Equilibrium constant for the dissociation of methyl violet is 10−1 .
Chapter U6 Solutions
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