Ammonium phosphate and ammonium sulfate are made from ammonia - Edexcel - GCSE Chemistry - Question 2 - 2016 - Paper 1
Question 2
Ammonium phosphate and ammonium sulfate are made from ammonia.
These compounds can be used as fertilisers.
(a) Ammonia solution is alkaline.
Which of the followin... show full transcript
Worked Solution & Example Answer:Ammonium phosphate and ammonium sulfate are made from ammonia - Edexcel - GCSE Chemistry - Question 2 - 2016 - Paper 1
Step 1
Which of the following could be used to show that ammonia solution is alkaline?
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Answer
The best choice among the options provided is B, the pH meter. A pH meter is specifically designed to measure the pH of a solution accurately, which will confirm if ammonia solution is indeed alkaline.
Step 2
Give one advantage of using fertilisers made from ammonia rather than using manure.
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Answer
One advantage of using fertilisers made from ammonia is that they provide a more concentrated source of nutrients, which can lead to improved plant growth and yield compared to manure, which can be variable in nutrient content.
Step 3
Give the name of a piece of apparatus that could be used to measure out the 25 cm³ dilute phosphoric acid.
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The appropriate piece of apparatus for measuring out 25 cm³ of dilute phosphoric acid is a graduated pipette.
Step 4
Complete the word equation for this reaction.
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Answer
ammonia + phosphoric acid → ammonium phosphate.
Step 5
Describe how pure, dry crystals of ammonium phosphate are obtained from the ammonium phosphate solution.
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Answer
To obtain pure, dry crystals of ammonium phosphate from the solution, first heat the solution to evaporate the water, which will lead to crystallization. After the water has evaporated, filter off the dry crystals formed to separate them from any remaining solution.
