CAIE A Level Chemistry 9701 · Nitrogen and sulfur
Ammonia gas is bubbled through concentrated nitric acid, , to form a white solid, ammonium nitrate, .
(a) Using the Brønsted–Lowry theory, explain why ammonia acts as a base in this reaction.
(b) State the structure of the ammonium ion and explain how it is formed.
4 marks, so the mark scheme is looking for about 4 separate creditworthy points. Making the same point twice in different words earns it once.
Suggest means: Apply what you know to an unfamiliar situation. There may be more than one acceptable answer. Reason from the principle you have learned to the new context, and say which principle you are using.
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