transition metals☹️ Flashcards

1
Q

Cr3+ aqueous ion colour and formula

A

Violet solution

[Cr(H2O)6]3+

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2
Q

Fe2+ aqueous colour and formula

A

Green solution

[Fe(H2O)6]2+

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3
Q

Fe3+ aqueous colour and formula

A

Yellow solution

[Fe(H2O)6]3+

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4
Q

Mn2+ aqueous colour and formula

A

Pale pink solution

[Mn(H2O)6]2+

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5
Q

Cu2+ aqueous colour and formula

A

Blue solution

[Cu(H2O)6]2+

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6
Q

Cr3+ and NaOH

colour change and equation

A

initially
violet solution to green ppt
[Cr(H2O)6]3+ + 3OH- = Cr(OH)3(H2O)3

in excess
violet solution to green solution
[Cr(H2O)6]3+ + 6OH- = [Cr(OH)6]3-

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7
Q

Fe2+ and NaOH colour change and equation

A

green solution to green ppt

[Fe(H2O)6]2+ + 2OH- -> Fe(OH)2(H2O)4

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8
Q

Fe3+ and NaOH colour change and equation

A

yellow solution to brown ppt

[Fe(H2O)6]3+ +OH- -> Fe(OH)3(H2O)3

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9
Q

Mn2+ and NaOH colour change and equation

A

pale pink solution to pale brown ppt

[Mn(H2O)6]2+ + OH- -> Mn(OH)2(H2O)4

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10
Q

Cu2+ and NaOH colour change and equation

A

blue solution to blue ppt

[Cu(H2O)6]2+ + OH- -> Cu(OH)2(H2O)4

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11
Q

Cr3+ and NH3 colour change and equation

A

initially
violet solution to green ppt
[Cr(H2O)6]3+ +NH3 -> Cr(OH)3(H2O)3 + NH4+

in excess
to purple solution
[Cr(NH3)6]3+

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12
Q

Fe2+ and NH3 colour change and equation

A

green solution to green ppt

[Fe(H2O)6]2+ + NH3 -> Fe(OH)2(H2O)4 + NH4+

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13
Q

Fe3+ and NH3 colour change and equation

A

yellow solution to brown ppt

[Fe(H2O)6]3+ + NH3 -> Fe(OH)3(H2O)3

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14
Q

Mn2+ and NH3 colour change and equation

A

pale pink ppt to pale brown ppt

[Mn(H2O)6]2+ + NH3 -> Mn(OH)2(H2O)4

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15
Q

Cu2+ and NH3 colour change and equation

A

initially
blue solution to blue ppt

[Cu(H2O)6]2+ +NH3 -> Cu(OH)2(H2O)4

in excess
deep blue solution
[Cu(NH3)4(H2O)2]2+

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16
Q

Cu2+ and chlorine colour change and equation

A

[Cu(H2O)6]2+ + 4Cl- -> [CuCl4]2- +6H2O

blue solution to yellow solution

17
Q

what is a transition metal

A

has at least one ion with partially filled d orbital

18
Q

three types of reactions of transition metals

A

ppt, ligand sub, redox