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標題:
F4 Acids and Bases
發問:
For each of the following experiments, (i) state the expected observable change(s) and (ii) write ionic equation(s) for the reation(s) involved. 1. Mixing ammonium carbonate solution and calcium chloride solution. 2. Mixing iron(ii) sulphate solution with dulite aqueous ammonia.
最佳解答:
1. Mixing ammonium carbonate solution and calcium chloride solution. (i) A white precipitate is formed. (ii) Ca^2+(aq) + CO3^2-(aq) → CaCO3(s) 2. Mixing iron(II) sulphate solution with dulite aqueous ammonia. (i) A dirty green precipitate is formed. (ii) NH3(aq) + H2O(l) = NH4^+(aq) + OH^-(aq) ('=' represent the double-arrow sign of reversible reaction.) Fe^2+(aq) + 2OH^-(aq) → Fe(OH)2(s)
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