Colours Flashcards by alex h | Brainscape

Q

Fe 2+ Aqua ion

A

[Fe(H2O)6]2+
Pale Green
Solution

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Q

Co 2+ Aqua ion

A

[Co(H2O)6]2+
Pink
Solution

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Q

Cu 2+ Aqua ion

A

[Cu(H2O)6]2+
Pale Blue
Solution

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Q

Fe 3+ Aqua ion

A

[Fe(H2O)6]3+
Yellow
Solution

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Q

Al 3+ Aqua ion

A

[Al(H2O)6]3+
Colourless
Solution

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Q

Cr 3+ Aqua ion

A

[Fe(H2O)6]2+
Green
Solution

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Q

Fe 2+ with dilute OH- or NH3

A

Fe(H2O)4(OH-)2
Green
Ppt

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Q

Co 2+ with dilute OH- or NH3

A

Co(H2O)4(OH-)2
Blue
Ppt

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Q

Cu 2+ with dilute OH- or NH3

A

Cu(H2O)4(OH-)2
Pale Blue
Ppt

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Q

Fe 3+ with dilute OH- or NH3

A

Fe(H2O)3(OH-)3
Brown
Ppt

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Q

Al 3+ with dilute OH- or NH3

A

Al(H2O)3(OH-)3
White
Ppt

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Q

Cr 3+ with dilute OH- or NH3

A

Cr(H2O)3(OH-)3
Green
Ppt

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Q

Fe 2+ with excess OH-

A

Fe(H2O)4(OH-)2
Green
Ppt

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Q

Co 2+ with excess OH-

A

Co(H2O)4(OH-)2
Blue
Ppt

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Q

Cu 2+ with excess OH-

A

Cu(H2O)4(OH-)2
Pale Blue
Ppt

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Q

Fe 3+ with excess OH-

A

Fe(H2O)3(OH-)3
Brown
Ppt

Q

Al 3+ with excess OH-

A

[Al(OH-)4(H2O)2]3-
White
Ppt

Q

Cr 3+ with excess OH-

A

[Cr(OH-)6]3-
Green
Ppt

Q

What will be produced if Fe(H2O)4(OH-)2 is oxidised by air?

And what would be observed?

A

Fe(H20)3(OH-)3
Brown
Solution

Q

What will be produced if Co(H2O)4(OH-)2 or[Co(NH3)6]2+ is oxidised by air?
And what would be observed?

A

Co(III) Complex Ion
Brown
Solution

Q

Fe 2+ with excess NH3

A

Fe(H2O)4(OH-)2
Green
Ppt

Q

Co 2+ with excess NH3

A

[Co(NH3)6]2+
Pale Brown
Solution

Q

Cu 2+ with excess NH3

A

[Cu(H2O)2(NH3)4]2+
Deep Blue
Solution

Q

Fe 3+ with excess NH3

A

Fe(H2O)3(OH-)3
Brown
Ppt

Q

Al 3+ with excess NH3

A

Al(H2O)3(OH-)3
White
Ppt

Q

Cr 3+ with excess NH3

A

[Cr(NH3)6]2+
Purple
Solution

Q

Fe 3+ with CO3 2-

A

Fe(H2O)3(OH-)3 + CO2
Brown
Ppt

Q

Al 3+ with CO3 2-

A

Al (H2O)3(OH-)3 + CO2
White
Ppt

Q

Cr 3+ with CO3 2-

A

Cr(H2O)3(OH-)3 + CO2
Green
Ppt

Q

Fe 2+ with CO3 2-

A

FeCO3
Green
Ppt

Q

Co 2+ with CO3 2-

A

CoCO3
Pink
Ppt

Q

Cu 2+ with CO3 2-

A

CuCO3
Green - Blue
Ppt

Q

Co 2+ with conc HCL

A

[CoCl4]2-
Blue
Solution

Q

Cu 2+ with conc HCL

A

[CuCl4]2-
Yellow
Solution