Question detail
What are the names of the salts produced when phosphate rock reacts with nitric acid, sulfuric acid, and phosphoric acid?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
The Haber process and the use of NPK fertilisers
Question
What are the names of the salts produced when phosphate rock reacts with nitric acid, sulfuric acid, and phosphoric acid?
Answer
The salts produced are calcium nitrate when phosphate rock reacts with nitric acid, calcium sulfate when it reacts with sulfuric acid, and calcium phosphate when it reacts with phosphoric acid.
Explanation
A strong answer should directly address the approved learning objective to recall the names of salts made when phosphate rock reacts with nitric acid, sulfuric acid and phosphoric acid. (Chemistry only). This question belongs to Production and uses of NPK fertilisers within The Haber process and the use of NPK fertilisers, so the response should use that exact curriculum context rather than a generic statement. The answer is correct when it names the key idea, explains the link to chemistry only, and keeps the wording specific to AQA GCSE revision.
Common mistake
Common Mistake in Salt Names
Students often confuse the names of salts produced from phosphate rock reactions with different acids.
To fix this, students should memorize the specific salts formed from each acid: for nitric acid, it's calcium nitrate; for sulfuric acid, it's calcium sulfate; and for phosphoric acid, it's calcium phosphate.
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