Identifying Cations in Solution (HSC SSCE Chemistry): Quizzes

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Identifying Cations in Solution
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Which of these cations is NOT a metal ion?

NH4+\text{NH}_4^+

What happens to electrons in flame tests?

Jump to excited state then return

What flame color does Ca2+\text{Ca}^{2+} produce?

Brick-red

Which two cations do NOT produce colored flames?

Mg2+\text{Mg}^{2+} and Ag+\text{Ag}^+

What color precipitate forms when OH−\text{OH}^- is added to Fe3+\text{Fe}^{3+}?

Brown

How can you distinguish AgCl\text{AgCl} from PbCl2\text{PbCl}_2 precipitates?

AgCl\text{AgCl} dissolves in ammonia

What color appears when SCN−\text{SCN}^- is added to Fe3+\text{Fe}^{3+}?

Blood red

What must ligands contain to form complexes?

At least one lone pair of electrons

What happens when NH3\text{NH}_3 is added to Cu(OH)2\text{Cu(OH)}_2 precipitate?

Dissolves forming deep blue solution

Why should multiple tests be used for cation identification?

To confirm results accurately

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