Identify the conjugate acid and conjugate base for the $HCO_3{ }^{-}$ ion,respectively.

  • A
    $CO_3{ }^{2-}$ and $H_2CO_3$
  • B
    $H_2CO_3$ and $CO_2$
  • C
    $CO_2$ and $H_2CO_3$
  • D
    $H_2CO_3$ and $CO_3{ }^{2-}$

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The conjugate base of $HPO_4^{2-}$ is:

$(i)$ $A$ strong acid has a weak conjugate base.
$(ii)$ An acid is an electron pair acceptor.
The above statements $(i)$ and $(ii)$ are:

Identify the conjugate acid-base pair from the following equilibrium reaction.
$HSO_{3(aq)}^{-} + H_3O_{(aq)}^{+} \rightleftharpoons H_2SO_3 + H_2O$

Which one of the following statements is correct?

Which of the following species acts as both a $Br\text{ø}nsted$ acid and a $Br\text{ø}nsted$ base?

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