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

Conjugate acid and conjugate base of $\mathrm{HCO}_3^{-}$are respectively
  1. $\mathrm{H}_2 \mathrm{CO}_3, \mathrm{H}_3 \mathrm{CO}_3^{+}$
  2. $\mathrm{H}_2 \mathrm{CO}_3, \mathrm{CO}_3^{2-}$
  3. $\mathrm{CO}_3^{2-}, \mathrm{H}_2 \mathrm{CO}_3$
  4. $\mathrm{CO}_3^{2-}, \mathrm{CO}_2$

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 $\mathrm{H}^{+}$)

Asked in: AP EAMCET 2023 (16 May Shift 1)

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