Which of the following is not a conjugate aci | vedclass

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Question

(D) conjugate acid-base pair differs by only one proton $(H^+)$. $(a)$ $HPO_3^{2-}$ and $PO_3^{3-}$ differ by one $H^+$, so they form a conjugate pair

Vedclass · Accepted Answer

$H_2PO_4^{-}, PO_4^{3-}$

Vedclass · Answer

(D) conjugate acid-base pair differs by only one proton $(H^+)$. $(a)$ $HPO_3^{2-}$ and $PO_3^{3-}$ differ by one $H^+$, so they form a conjugate pair. $(b)$ $H_2PO_4^{-}$ and $HPO_4^{2-}$ differ by one $H^+$, so they form a conjugate pair. $(c)$ $H_3PO_4$ and $H_2PO_4^{-}$ differ by one $H^+$, so they form a conjugate pair. $(d)$ $H_2PO_4^{-}$ and $PO_4^{3-}$ differ by two protons $(2H^+)$, therefore they do not form a conjugate acid-base pair.

Which of the following is not a conjugate acid-base pair?

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