TM Colours Flashcards by Aarya Sumesh

Q

VO2 + is what charge and what colour

A

+5 and yellow

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Q

V3+ is what charge and what colour

A

+3 and green

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Q

VO^+2 is what colour and what charge

A

+4 and blue

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Q

V^2+ is what charge and what colour

A

+2 and purple

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Q

Co 2+ aqueous formula and colour

A

[Co(H2O)6]+2

Pink sol

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Q

Co +2 and OH- dropwise formula and colour

A

[Co(OH)2(H2O)4]

Pink ppt turns blue on standing

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Q

Co 2+ and OH - excess formula and colour

A

[Co(OH)6]-4

Pink ppt turns blue on standing

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Q

CO 2+ and NH3 dropwise formula and colour

A

[Co(OH)2(H2O)4]

Pink ppt turns blue on standing

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Q

Co 2+ and Cl- formula and colour

A

[CoCl4)-2

Blue sol

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Q

Co +2 and NH3 excess formula and colour

A

[Co(NH3)6]-4

Brown sol

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Q

Co +2 and H2O2 formula and colour

A

[Co(OH)6]-4

Blue sol

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Q

Cu 2+ aqueous formula and colour

A

[Cu(H2O)6] +2

Pale blue sol

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Q

Cu +2 and OH- dropwise formula and colour

A

[Cu(OH)2(H2O)4]

Blue ppt

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Q

Cu +2 and OH- excess

A

[Cu(OH)6] - 4

Blue ppt

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Q

Cu +2 and NH3 dropwise

A

[Cu(OH)2(H2O)4]-4

Blue ppt

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Q

Cu +2 and NH3 excess

A

[Cu(NH3)6] -4

Dark blue sol

Q

Cu +2 and Cl-

A

[CuCl4]-2

Yellow sol

Q

Cu +2 and H2O2

A

[Cu(OH)6] -4

Yellow solution

Q

Fe +2 aqueous

A

[Fe(H2O)6]-4

Pale green solution

Q

Fe +2 and OH- dropwise

A

[Fe(OH)2(H2O)4]

Green ppt

Q

Fe +2 and OH - excess

A

[Fe(OH)6]-4

Green ppt

Q

Fe +2 and NH3 dropwise

A

[Fe(OH)2(H2O)4]

Green ppt

Q

Fe 2+ and NH3 excess

A

[Fe(NH3)]-4

Green ppt

Q

Fe +2 and H2O2

A

[Fe(OH)6] -4

Green ppt

Cr +3 aqueous

[Cr(H2O)]+3 Green/Violet sol

Cr +3 and OH- dropwise

[Cr(OH)3(H2O)3] Green sol

Cr +3 and OH- excess

[Cr(OH)6]-3 Dark green solution

Cr +3 and NH3 dropwise

[Cr(OH)3(H2O)3] Grey - Green ppt

Cr +3 and NH3 excess

[Cr(NH3)6]-3 Violet sol

Cr +3 and H2O2

CrO4 -2 Yellow

If product from reaction of Cr +3 and H2O2 is reacted with H+, what will happen

Cr2O7 -2 formed | Yellow to orange

Fe +3 aqueous

[Fe(H2O)6]+3 Pale Yellow sol

Fe +3 and OH - dropwise

[Fe(OH)3(H2O)3] Brown ppt

Fe +3 and OH - excess

[Fe(OH)6]-3 Brown ppt

Fe +3 and NH3 dropwise

[Fe(OH)3(H2O)3] Brown ppt

Fe +3 and NH3 excess

[Fe(NH3)6] -3 Brown ppt

Fe +3 and H2O2

[Fe(OH)6]-3 Brown ppt