Q13 / 160 · AP EAMCET 2023 (16 May Shift 1) · Chemistry

Conjugate acid and conjugate base of $\mathrm{HCO}_3^{-}$are respectively

  • A
    $\mathrm{H}_2 \mathrm{CO}_3, \mathrm{H}_3 \mathrm{CO}_3^{+}$
  • Correct answer
    B
    $\mathrm{H}_2 \mathrm{CO}_3, \mathrm{CO}_3^{2-}$
  • C
    $\mathrm{CO}_3^{2-}, \mathrm{H}_2 \mathrm{CO}_3$
  • D
    $\mathrm{CO}_3^{2-}, \mathrm{CO}_2$

Solution

Conjugate acid of $\mathrm{HCO}_3^{-}=\mathrm{H}_2 \mathrm{CO}_3$ (has an extra $\mathrm{H}^{+}$) Conjugate base of $\mathrm{HCO}_3^{-}=\mathrm{CO}_3^{2-}$ (has an less $\mathrm{H}^{+}$)

Hence, the correct answer is option: 'B'.

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