Separation Of Cations Flashcards by Salve Billena | Brainscape

Q

Group 2 Reagent/s

A

0.3M HCl, H2S or 10% CH2CNH2 (thioacetamide)

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Q

Group 1 Reagent/s

A

3M HCl

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Q

Group 3 Reagent/s

A

6M NH4Cl, 12M NH4OH, H2S or 10% CH2CNH2 (thioacetamide)

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Q

Group 4 Reagent/s

A

12M NH4OH, 3M (NH4)2CO3, 95% ethanol

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Q

Group 2 Solubility Reagent/s

A

1M NaOH, 1M Na2S

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Q

Group 3 Solubility Reagent/s

A

1M NaOH, 1M Na2O2

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Q

Group 1 Precipitates

A

White ppt
AgCl
PbCl2
Hg2Cl2

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Q

Group 2 Precipitates

A

Black ppt
Bi2S3, CuS, HgS

Yellow ppt
CdS, As2S3, As2S5, SnS2

Brown ppt
SnS

Orange ppt
Sb2S3, Sb2S5

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Q

Group 2 Solubility

A

Insoluble
CuS, PbS, CdS, Bi2S3

Soluble
As(3+), As(5+), Sb(3+), Sb(5+), Sn(2+), Sn(4+), Hg(2+)

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Q

Group 3 Precipitates

A

White ppt
Al(OH)3, ZnS

Grayish-green ppt
Cr(OH)3

Reddish-brown ppt
Fe2S3

Flesh ppt
MnS

Black ppt
CoS, NiS, FeS

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Q

Group 3 Solubility

A

Insoluble
MnS, Cos, NiS, FeS, Fe2S3

Soluble
Al(3+), Cr(3+), Zn(2+)

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Q

Group 4 Precipitate

A

White ppt

BaCO3, SrCO3, CaCO3, MgCO3

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Q

Group 5 Precipitates

A

No ppt~ colorless solution

Na+, K+, Li+, NH4+

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Q

Group 1

A

Silver group

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Q

Group 2

A

Hydrogen sulfide Group

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Q

Group 2 Insoluble group

A

Copper subgroup

Q

Group 2 Soluble group

A

Tin subgroup

Q

Group 3

A

Ammonium sulfide Group