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Chemistry > Aqueous ions > Flashcards

Aqueous ions Flashcards

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1
Q

Where is the bond formed on metal aqua ion?

A

The lone pair on the oxygen

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2
Q

What is the acidity of the ions?

A

+3 are acidic
+2 are neutral or weak acids

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3
Q

Why are +3 more acidic than +2?

A

As they have a greater charge so they polarise the O-H bond more so it breaks more easily

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4
Q

Which metal aqua ions react with excess hydroxide ions?

A

Aluminium 3+

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5
Q

What colour precipitate does Iron(II) aqua ion form with hydroxide ion?

A

Green

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6
Q

What colour precipitate does Copper(II) aqua ion form with hydroxide ion?

A

Blue

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7
Q

What colour precipitate does Iron(III) aqua ion form with hydroxide ion?

A

Brown

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8
Q

What colour precipitate does Aluminium(III) aqua ion form with hydroxide ion?

A

White

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9
Q

What colour precipitate does Aluminium(III) aqua ion form with excess hydroxide ion?

A

Colourless solution

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10
Q

Which metal hydroxide is amphoteric?

A

Aluminium

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11
Q

Why is NH3 a weak base?

A

As it reacts with water to form OH- and NH4+

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12
Q

What colour precipitate does Aluminium(III) aqua ion form with NH3?

A

White

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13
Q

What colour precipitate Iron(II) aqua ion form with NH3?

A

Green then brown when left in air

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14
Q

What colour precipitate Iron(III) aqua ion form with NH3?

A

Brown

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15
Q

What colour precipitate Copper(II) aqua ion form with NH3?

A

blue

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16
Q

Which metal aqua ion reacts with excess NH3 (Ammonia)?

A

Copper

17
Q

What colour precipitate Copper(II) aqua ion form with excess NH3?

A

Deep Blue

18
Q

What is the reaction when copper(II) reacts with excess NH3 (ammonia)?

A

Partial ligand substitution forming [Cu(H2O)2(NH3)4)]2+

19
Q

What happens when sodium carbonate (Na2CO3) reacts with 2+ ions?

A

They form metal carbonates with precipitates

20
Q

Why don’t 3+ ions form metal carbonates?

A

As they are more acidic so the carbonate reacts with H3O+

21
Q

How can +2 and +3 ions be distinguished?

A

React them with carbonate ions as the +3 will effervesce whilst +2 will not

22
Q

What colour precipitate Iron(II) aqua ion form with Na2CO3?

A

Green

23
Q

What colour precipitate Copper(III) aqua ion form with Na2CO3?

A

Blue Green

24
Q

What colour precipitate Iron(III) aqua ion form with Na2CO3?

A

Brown

25
Q

What colour precipitate Aluminium(III) aqua ion form with Na2CO3?

A

white

26
Q

What colour is the Iron(II) aqueous ion?

A

Green

27
Q

What colour is the Iron(III) aqueous ion?

A

Purple

28
Q

What colour is the Copper(III) aqueous ion?

A

Blue

29
Q

What colour is the Aluminium(III) aqueous ion?

A

Colourless

30
Q

How do you form a +2 hexaaqua ion from a +3?

A

Excess zinc in acid

Chemistry (28 decks)

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