O-LevelChemistryAcids, Bases & Salts5070/12 · May/June 2022 · Q251 Mark
When ammonia gas is dissolved in water a reversible reaction takes place. NH₃(g) + H₂O(l) ⇌ NH₄⁺(aq) + OH⁻(aq) Which statements are correct? 1 Ammonia is an alkali because it produces hydroxide ions in solution. 2 The pH of this solution is 7. 3 Adding hydroxide ions to the mixture at equilibrium produces more ammonia.
A1, 2 and 3
B1 and 3 only
C1 only
D2 and 3 only
✓ Correct answer
B: 1 and 3 only
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