1.1. This question is about ammonia.

i) Explain how ammonia can be prepared from ammonium chloride and calcium hydroxide.

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ii) Explain how the presence of ammonia gas can be confirmed.

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1.2. Explain why the reaction between ammonium chloride and calcium hydroxide is an example of an acid-base reaction.

1.3. i) Draw a diagram of the ammonium ion showing all of the bonds within the molecule.

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ii) The N-H bonds in the ammonium ion have been found to be equal in length. Suggest what this means about the bonds or charge on the ion.

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