Identifying Ions in Solution (HSC SSCE Chemistry): Flashcards

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Identifying Ions in Solution
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Precipitation reaction definition

Solid forms when two solutions are mixed

Precipitate definition

Solid that forms in a precipitation reaction

High solubility threshold

0.1\geq 0.1 mol L1^{-1}

Low solubility threshold

<0.1< 0.1 mol L1^{-1}

Solubility of Group 1 and NH4+_4^+ compounds

All have high solubility in water

Solubility of all nitrate compounds

All soluble

Which chlorides have low solubility?

Ag+^+, Pb2+^{2+}, Cu2+^{2+}

Visual sign of precipitate formation

Cloudiness in previously clear solution

Test reagent for Ag+^+, Pb2+^{2+}, Cu2+^{2+}

Add chloride ions; precipitate forms if present

Hydroxides with low solubility

Most (except Group 1, Sr2+^{2+}, Ba2+^{2+}, NH4+_4^+)

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