04 - Qualitative Analysis of Solutions PDF

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4 - Qualitative Analysis of Solutions

SCH3UE – Solution Chemistry

Date: ______________________________________________

Qualitative Analysis of Solutions A solution may contain one or all of the following ions: Ag+, Ba2+, and Mg2+ Using your understanding of the solubility rules and chemical reactions, devise a test that you could use to identify which of these ions are present in the solution Use net ionic equations to illustrate a positive test for each ion

Choose an anion to precipitate only silver ions

Choose an anion to precipitate only barium but not magnesium ions

Choose an anion to precipitate only magnesium ions

Suppose that the solution contain all of these ions Prepare a procedure that could be used to selectively separate each of these ions from each other and the solution

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4 - Qualitative Analysis of Solutions

SCH3UE – Solution Chemistry

Solution Colour The identity of a metal ion can be inferred by the colour of aqueous solution it forms Ion

Solution Colour

Cu2+

_________________________

Co2+

_________________________

Ni2+

_________________________

MnO4-

_________________________

Alkali Metals

_________________________

Flame Test The identity of a metal (atom or ion) can be inferred by the colour of the flame containing the metal Metal

Flame colour

Li+

_________________________

Na+

_________________________

K+

_________________________

Cu+

_________________________

Cu2+

_________________________

Sr2+

_________________________

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