smc-3673-50-Acid Reactions

CHEMISTRY, M6 2024 HSC 21

A solution of acetic acid reacts with magnesium metal.

Write the names of the products of this reaction in the boxes provided. (2 marks)

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Products: hydrogen gas \(\ce{H2(g)}\) and magnesium acetate/ethanoate \(\ce{Mg(CH3COO)2(aq)}\)

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Acid + active metal \(\ce{->}\) hydrogen + salt
Products: hydrogen gas \(\ce{H2(g)}\) and magnesium acetate/ethanoate \(\ce{Mg(CH3COO)2(aq)}\)

The following equation describes an equilibrium reaction.

\( \ce{HF(aq) + PO4^3-(aq) \rightleftharpoons HPO4^2-(aq) + F-(aq)} \)

Identify ONE base and its conjugate acid in the above equation. (2 marks)

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Possible answers:

\begin{array} {ll}
\text{Base} & \text{Conjugate Acid} \\
\hline \ce{PO4^3-(aq)} & \ce{HPO4^2-(aq)} \\
\ce{F-(aq)} & \ce{HF(aq)} \\
\end{array}

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Possible answers:

\begin{array} {ll}
\text{Base} & \text{Conjugate Acid} \\
\hline \ce{PO4^3-(aq)} & \ce{HPO4^2-(aq)} \\
\ce{F-(aq)} & \ce{HF(aq)} \\
\end{array}