M is a cation which exists as a nitrate compound in an aqueous solution. Part of this solution is separated and H2S gas is sent. Then a black precipitate is given. Next, another part of this M's nitrate solution is separated. When NaOH is added, white precipitate is given

M is a cation which exists as a nitrate compound in an aqueous solution. Part of this solution is separated and H2S gas is sent. Then a black precipitate is given. Next, another part of this M's nitrate solution is separated. When NaOH is added, white precipitate is given

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter12: Gravimetric Methods Of Analysis

Section: Chapter Questions

Problem 12.6QAP

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Question

M is a cation which exists as a nitrate compound in an aqueous solution. Part of this solution is separated and
H2S gas is sent. Then a black precipitate is given. Next, another part of this M's nitrate solution is separated.
When NaOH is added, white precipitate is given. With excess NaOH, white precipitate dissolve and give
colourless solution. What could be the cation?

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