TRANSITION METAL COLOURS Flashcards by India Cook

Q

Cr(III) with limited sodium hydroxide…

A

GREEN PPT

[Cr (H20)3 (OH)3]

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Q

Cr(III) with excess sodium hydroxide…

A

(precipitate dissolves…)

GREEN SOLUTION

[Cr (H2O)2 (OH)4]

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Q

Cr(III) with limited aqueous ammonia…

A

GREEN PPT

[Cr (H2O)3 (OH)3]

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Q

Cr(III) with excess aqueous ammonia…

A

(precipitate dissolves…)

GREEN SOLUTION

[Cr (NH3)6] 3+

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Q

Mn(II) in aqueous solution…

A

PALE PINK

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Q

Mn(II) with limited sodium hydroxide…

A

(gelatinous)

WHITE PPT

(turns brown/darkens on standing in air)

[Mn (OH)2]

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Q

Mn(II) with excess sodium hydroxide…

A

PPT INSOLUBLE IN EXCESS

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Q

Mn(II) with limited aqueous ammonia…

A

(gelatinous)

WHITE PPT

(turns brown/darkens on standing in air)

[Mn (OH)2]

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Q

Mn(II) with excess aqueous ammonia…

A

PPT INSOLUBLE IN EXCESS

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Q

Fe(II) in aqueous solution…

A

PALE GREEN/BLUE

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Q

Fe(II) with limited sodium hydroxide…

A

(gelatinous)

PALE GREEN PPT

(turns brown/darkens on standing in air)

[Fe (OH)2]

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Q

Fe(II) with excess sodium hydroxide…

A

PPT INSOLUBLE IN EXCESS

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Q

Fe(II) with limited aqueous ammonia…

A

(gelatinous)

PALE GREEN PPT

(turns brown/darkens on standing in air)

[Fe (OH)2]

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Q

Fe(II) with excess aqueous ammonia…

A

PPT INSOLUBLE IN EXCESS

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Q

Fe(III) in aqueous solution…

A

YELLOW

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Q

Fe(III) with limited sodium hydroxide…

A

RED/BROWN PPT

[Fe(H2O)3(OH)3]
[Fe2O3•xH2O]

Q

Fe(III) with excess sodium hydroxide…

A

PPT INSOLUBLE IN EXCESS

Q

Fe(III) with limited aqueous ammonia…

A

RED/BROWN PPT

[Fe(H2O)3(OH)3]
[Fe2O3•xH2O]

Q

Fe(III) with excess aqueous ammonia…

A

PPT INSOLUBLE IN EXCESS

Q

Ni(II) in aqueous solution…

A

EMERALD GREEN

Q

Ni(II) with limited sodium hydroxide…

A

EMERALD GREEN PPT

[Ni(OH)2]

Q

Ni(II) with excess sodium hydroxide…

A

PPT INSOLUBLE IN EXCESS

Q

Ni(II) with limited aqueous ammonia…

A

EMERALD GREEN PPT

[Ni(OH)2]

Q

Ni(II) with excess aqueous ammonia…

A

(precipitate dissolves…)

LAVENDER BLUE SOLUTION

[Ni(NH3)6] 2+

Cu(II) in aqueous solution...

BLUE

Cu(II) with limited sodium hydroxide...

(gelatinous) BLUE PPT [Cu(OH)2]

Cu(II) with excess sodium hydroxide...

PPT INSOLUBLE IN EXCESS

Cu(II) with limited aqueous ammonia...

(gelatinous) BLUE PPT [Cu(OH)2]

Cu(II) with excess ammonia...

(precipitate dissolves) DEEP BLUE SOLUTION [Cu(NH3)4(H2O)2] 2+

Zn...

COLOURLESS

Cr(III) in aqueous solution...

VIOLET