An antacid tablet with the active ingredient sodium hydrogencarbonate,

CHEMISTRY · Subjective · CBSE · Chemistry · Some Basic Concepts of Chemistry · Some Basic Concepts of Chemistry

Problem

\mathrm{NaHCO_3}

, and mass

0.300\,\mathrm{g}

was added to

25.00\,\mathrm{cm}^3

0.125\,\mathrm{mol\,dm^{-3}}

hydrochloric acid. After the reaction was completed, the excess hydrochloric acid required

3.55\,\mathrm{cm}^3

0.200\,\mathrm{mol\,dm^{-3}}

\mathrm{KOH}

to reach the equivalence point in a titration. Calculate the percentage of

\mathrm{NaHCO_3}

in the tablet.