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Bromophenol blue can be used as the indicator for the titration of hydrogen carbonate ion, a...

Bromophenol blue can be used as the indicator for the titration of hydrogen carbonate ion, a weak base, with HCl, a strong acid. This reaction can be represented by the following equation:

HCO3- (aq) + H+ (aq) --> H2CO3 (aq)

The equivalence point of this titration occurs at about pH 3.8. Qualitatively describe the series of color changes that occur as this titration proceeds.

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