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Question
From the list given below, select the word(s) required to correctly complete the blanks (i) to (v) in the following passage:
Ammonia, Ammonium, Carbonate, Carbon dioxide, Hydrogen, Hydronium, Hydroxide, Precipitate, Salt, Water.
A solution ‘X’ turns blue litmus red so it must contain (i) ______ ions; another solution ‘Y’ turns red litmus blue and therefore must contain (ii) ______ ions. When solutions X and Y are mixed together, the products will be a (iii) ______ and (iv) ______. If a piece of magnesium was put into solution X, (v) ______ gas would be evolved.
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Solution
A solution ‘X’ turns blue litmus red so it must contain (i) hydronium ions; another solution ‘Y’ turns red litmus blue and therefore must contain (ii) hydroxide ions. When solutions X and Y are mixed together, the products will be a (iii) salt and (iv) water. If a piece of magnesium was put into solution X, (v) hydrogen gas would be evolved.
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