This question is about water and air. River water needs to be treated to make it safe to drink. Two of the stages used in the treatment of domestic water are the addition of carbon and chlorination. Describe the reason for each of these stages. addition of carbon . chlorination .

Chemistry

IGCSE&ALevel

CAIE

Exam No：0620_s25_qp_31 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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