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6.3 Interpreting and interacting with earth systems

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Question 9

At an arid port, a desalination unit forces sea water at high pressure against a partially permeable membrane. The sea water contains water molecules and dissolved ions.

Which outcome describes what happens to the water molecules and dissolved ions?

[1]
A

Dissolved ions pass through the membrane, while water molecules stay behind.

B

Water molecules and dissolved ions both pass through the membrane.

C

Water molecules pass through the membrane, while most dissolved ions are held back.

D

Water molecules boil to form vapour, while dissolved salts stay behind.

Markscheme

6.3 Interpreting and interacting with earth systems Questions

  1. GCSE
  2. /Chemistry
  3. /6.3 Interpreting and interacting with earth systems

109 exam-style questions on OCR GCSE Chemistry 6.3 Interpreting and interacting with earth systems, covering 6.3.1 Formation and evolution of the atmosphere, 6.3.2 The greenhouse effect and climate change, 6.3.3 Sources and problems of atmospheric pollutants, and 6.3.4 Producing potable water. Each one has a worked solution and a mark scheme showing where the marks go.

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