Water is an amphoteric compound that also acts as a good solvent of polar and ionic compounds. Equation 1 shows water acting as a Brønsted-Lowry acid. equation $$\(1 \quad \mathrm{H}_{2} \mathrm{O}+\mathrm{NO}_{2}^{-} \rightleftharpoons \mathrm{HNO}_{2}+\mathrm{OH}^{-}\)$$ (i) Identify the two conjugate acid-base pairs in equation 1. (ii) Water also behaves as a Brønsted-Lowry acid when it dissolves $$\(\mathrm{CH}_{3} \mathrm{NH}_{2}\)$$. Explain the ability of $$\(\mathrm{CH}_{3} \mathrm{NH}_{2}\)$$ to act as a base. ................................................................................................................................. (iii) Write an equation to show water acting as a base with $$\(\mathrm{CH}_{3} \mathrm{COOH}\)$$. .................................................................................................................................

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