CAIE A-Level Chemistry AS 7.2.3 Br Nsted Lowry Theory of Acids and Bases Questions

Practise identifying Brønsted–Lowry acids, bases and conjugate pairs, and writing proton-transfer equations using CAIE 9701 AS questions.

Exam points

Apply Brønsted–Lowry theory to identify acids, bases, conjugate acids and conjugate bases.

[Maximum number: 1]

Diethylzinc, $\left(\mathrm{C}_{2} \mathrm{H}_{5}\right)_{2} \mathrm{Zn}$ , is added to NaOH(aq). Two reactions occur.

reaction $1 \quad\left(\mathrm{C}_{2} \mathrm{H}_{5}\right)_{2} \mathrm{Zn}+\mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{ZnO}+2 \mathrm{C}_{2} \mathrm{H}_{6}$

reaction $2 \quad \mathrm{H}_{2} \mathrm{O}+\mathrm{ZnO}+2 \mathrm{OH}^{-} \rightarrow \mathrm{Zn}(\mathrm{OH})_{4}{ }^{2-}$

In these reactions, which compounds act as Brønsted-Lowry acids?

reaction 1

reaction 2

$\left(\mathrm{C}_{2} \mathrm{H}_{5}\right)_{2} \mathrm{Zn}$

$\mathrm{H}_{2} \mathrm{O}$

ZnO

the reaction is not acid / base

ZnO

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CAIE A-Level Chemistry AS 7.2.3 Br Nsted Lowry Theory of Acids and Bases Questions question 1