Question

why acidic medium required in the Limit test for heavy metals?​

Answer 1

Answer:

Limit test of heavy metals is based on the reaction of metallic impurities with hydrogen sulfide in acidic medium to form colored solution.

Answer 2

Explanation:

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Here alcohol is added to prevent super saturation. Limit test of heavy metals is based on the reaction of metallic impurities with hydrogen sulfide in acidic medium to form colored solution. Metals that response to this test are lead, mercury, bismuth, arsenic, antimony, tin, cadmium, silver, copper, and molybdenum