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    Bromothymol Blue : Ka and Ionic Strength

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    1. Explain why it is not necessary to know the exact concentration of bromothymol blue in the solution.

    2. The pKa value can also be determined from Figure 4 - explain.

    3. The acid dissociation constant for bromothymol blue is dependent on ionic strength of solution.

    Determine the ionic strength of bromothymol blue by interpolating the values given below.

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    Solution Summary

    This solution explains:

    1) How to find pKa of a weak acid using a titration curve.

    2) How to find the ionic strength of bromothymol blue using a dissociation constant.