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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
Ammonia solution is alkaline. Which of the following could be used to show that ammonia solution is alkaline?
Answer
To test whether ammonia solution is alkaline, a pH meter (Option B) should be used. The pH meter provides an accurate measurement of the pH level of the ammonia solution, indicating its alkaline nature when the pH is above 7.
Step 2
Give one advantage of using fertilisers made from ammonia rather than using manure.
Answer
One advantage of using fertilisers made from ammonia is that they are more concentrated and provide specific nutrients that plants need for growth, whereas manure can be less consistent in nutrient content.
Step 3
Step 4
Step 5
Describe how pure, dry crystals of ammonium phosphate are obtained from the ammonium phosphate solution.
Answer
To obtain pure, dry crystals of ammonium phosphate from the solution, first heat the solution to allow water to evaporate. Once the solution becomes more concentrated, let it cool so that crystals form. Then, filter off the dry crystals that are separated from the remaining solution.