This question is about water and air. Water needs to be treated to make it safe to drink. Draw a line from each stage in the treatment of domestic water to the reason why it is carried out.

Chemistry

IGCSE&ALevel

CAIE

Exam No：0620_s25_qp_32 Year：2025 Question No：8(a)

Answer:

10.1.1. Describe chemical tests for the presence of water using anhydrous cobalt(II) chloride and anhydrous copper(II) sulfate

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