CAIE A-Level Chemistry 25.1.1 Conjugate Acids and Bases

Practise using conjugate-acid and conjugate-base terms for species linked by proton transfer.

Exam points

obtain a conjugate acid by adding one H+ and a conjugate base by removing one H+
preserve all other atoms and adjust the overall charge by exactly one when transferring the proton
label acid/base roles for the stated reaction direction, including amphiprotic species such as water

[Maximum number: 1]

Hypophosphorous acid is an inorganic acid.
The conjugate base of hypophosphorous acid is $\mathrm{H}_{2} \mathrm{PO}_{2}^{-}$ .

Give the formula of hypophosphorous acid.

$\mathrm{H}_{3} \mathrm{PO}_{2}$

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