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6.1 Improving processes and products

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Question 36

A laboratory uses a nutrient solution for seedlings. The solution contains ammonium sulfate, (NH4)2SO4\mathrm{(NH_{4})_{2}SO_{4}}(NH4​)2​SO4​, and potassium nitrate, KNO3\mathrm{KNO_{3}}KNO3​. The compounds in the table are soluble in water.

Available compoundFormula
Ammonium phosphate(NH4)3PO4\mathrm{(NH_{4})_{3}PO_{4}}(NH4​)3​PO4​
Potassium sulfateK2SO4\mathrm{K_{2}SO_{4}}K2​SO4​

Justify which compound should be added to the solution to support healthy root development.

[3]
Markscheme

6.1 Improving processes and products Questions

  1. GCSE
  2. /Chemistry
  3. /6.1 Improving processes and products

136 exam-style questions on OCR GCSE Chemistry 6.1 Improving processes and products, covering 6.1.1 Extracting metals industrially and by electrolysis, 6.1.2 Life cycle assessment and recycling, 6.1.3 Biological methods of metal extraction, 6.1.4 The Haber process and the production of fertilisers, 6.1.5 Alloys and their uses, 6.1.6 Corrosion and its prevention, 6.1.7 Comparing and selecting materials, and 6.1.8 Industrial conditions, rate and position of equilibrium. Each one has a worked solution and a mark scheme showing where the marks go.

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