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Inorganic Chemistry > Reactions of Ions in Aqueous Solutions > Flashcards

Reactions of Ions in Aqueous Solutions Flashcards

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1
Q

State what is meant by a metal-aqua complex.

A

a complex formed when a transition metal is forms co-ordinate bonds to water ligands

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2
Q

State the colour of the [Fe(H₂O)₆]²⁺ ion in solution.

A

green sol

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3
Q

State the colour of the [Cu(H₂O)₆]²⁺ ion in solution.

A

blue

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4
Q

State the colour of the [Fe(H₂O)₆]³⁺ ion in solution.

A

yellow sol

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5
Q

State the colour of the [Al(H₂O)₆]³⁺ ion in solution.

A

colourless solution

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6
Q

Explain why a 3+ metal aqua ion is more acidic than a 2+ one.

A

→ higher charge density so greater polarising power
→ therefore attracts water molecule more strongly & weakens O-H bond
→ breaking more easily & releasing H+ ions

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7
Q

State the colour and formula of the [Fe(H₂O)₆]²⁺ ion in NaOH.

A

Fe(H₂O)₄(OH)₂
green ppt

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8
Q

State the colour and formula of the [Cu(H₂O)₆]²⁺ ion in NaOH.

A

Cu(H₂O)₄(OH)₂
blue ppt

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9
Q

State the colour and formula of the [Fe(H₂O)₆]³⁺ ion in NaOH.

A

Fe(H₂O)₃(OH)₃
brown ppt

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10
Q

State the colour and formula of the [Al(H₂O)₆]³⁺ ion in NaOH.

A

Al(H₂O)₃(OH)₃
white ppt

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11
Q

State the colour and formula of the [Al(H₂O)₆]³⁺ ion in excess NaOH.

A

[Al(OH)₄]⁻
colourless solution

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12
Q

State the colour and formula of the [Fe(H₂O)₆]²⁺ ion in NH₃.

A

Fe(H₂O)₄(OH)₂
green ppt

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13
Q

State the colour and formula of the [Fe(H₂O)₆]³⁺ ion in NH₃.

A

Fe(H₂O)₃(OH)₃
brown ppt

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14
Q

State the colour and formula of the [Cu(H₂O)₆]²⁺ ion in NH₃.

A

Cu(H₂O)₄(OH)₂
blue ppt

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15
Q

State the colour and formula of the [Al(H₂O)₆]³⁺ ion in NH₃.

A

Al(H₂O)₃(OH)₃
white ppt

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16
Q

State the colour and formula of the [Cu(H₂O)₆]²⁺ ion in excess NH₃.

A

[Cu(H₂O)₂(NH₃)₄]²⁺
deep blue solution

17
Q

State the colour and formula of the [Cu(H₂O)₆]²⁺ ion in concentrated HCl.

A

[CuCl₄]²⁻
green-yellow solution

18
Q

What do X²⁺ ions form when reacted with carbonate solution?

A

XCO₃

19
Q

What do X³⁺ ions form when reacted with carbonate solution?

A

X(OH)₃(H₂O)₃ + 3CO₂ + 3H₂O

20
Q

State the colour and formula of the [Cu(H₂O)₆]²⁺ ion when it reacts with sodium carbonate.

A

CuCO₃
green-blue ppt

21
Q

Describe the appearance of CoCO3

A

purple solid

22
Q

State colour and appearance of [Fe(H₂O)₆]³ with Na2CO3

A

Fe(H₂O)₃(OH)₃
brown ppt

23
Q

Reactions with sodium hydroxide

A

All four metals will ppt, only aluminium hydroxide will dissolve in excess- due to amphoteric

24
Q

Reaction with ammonia

A

All four metal will form ppt, only copper hydroxide will dissolve in excess due to ligand sub

25
Q

Reactions with sodium carbonate

A

All four metals will ppt, Sol with Al3+ or Fe3+ bubble as CO2, Fe3+ will give off gas but Fe2+ wont

Inorganic Chemistry (13 decks)

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