A student titrates a 50.0 mL sample of chromic acid, H2CrO4, with 0.200 M KOH (aq). The titration reaches the endpoint after 42.5 mL of KOH (aq) has been added. Use this information to determine the concentration of the chromic acid solution. Show your work clearly.
2 KOH + H2CrO4 --> K2CrO4 + 2 H2O
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concentration of H2CrO4 is 0.085M
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