An indicator has the reaction Hln(aq) ↔ H+(aq) + In-(aq). Explain how the indicator can change color when a strong base is poured into a solution of this indicator. Will a strong base dissociate? Which way will this cause the reaction to shift? Is there more or less HIn? Do HIn and In- have the same color? Will the solution change color when a strong acid is poured into it? Why?
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