Reactions with Bases (AQA A-Level Chemistry): Quizzes

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Reactions with Bases
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What forms when NaOHNaOH is added to metal-aqua ions?

Insoluble metal hydroxides

How many OH−OH^- ions react with [M(H2O)6]2+[M(H_2O)_6]^{2+} in the NaOHNaOH reaction?

2

What colour precipitate forms when NaOHNaOH is added to Cu2+Cu^{2+} ions?

Blue

What colour precipitate forms when NaOHNaOH is added to Fe3+Fe^{3+} ions?

Brown

What happens to Al(OH)3Al(OH)_3 in excess OH−OH^-?

It dissolves forming [Al(OH)4]−[Al(OH)_4]^-

What happens when excess NH3NH_3 is added to Cu2+Cu^{2+} ions?

Ligand exchange forms [Cu(NH3)4(H2O)2]2+[Cu(NH_3)_4(H_2O)_2]^{2+}

What colour is the [Cu(NH3)4(H2O)2]2+[Cu(NH_3)_4(H_2O)_2]^{2+} complex?

Deep blue

What forms when [M(H2O)6]2+[M(H_2O)_6]^{2+} reacts with CO32−CO_3^{2-}?

MCO3MCO_3 precipitate

What is observed when [M(H2O)6]3+[M(H_2O)_6]^{3+} reacts with CO32−CO_3^{2-}?

Gentle fizzing with CO2CO_2 release

How many OH−OH^- ions react with [M(H2O)6]3+[M(H_2O)_6]^{3+} in the NaOHNaOH reaction?

3

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