Chemistry, asked by ritika637624, 5 months ago

why potassium iodide is added in limit test of arsenic?

Answers

Answered by niharikagurjar2005

0

$Answer$

Limit test of Arsenic is based on the reaction of arsenic gas with hydrogen ion to form yellow stain on mercuric chloride paper in presence of reducing agents like potassium iodide. ... Arsenious acid is further reduced to arsine (gas) by hydrogen and reacts with mercuric chloride paper to give a yellow stain.

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