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Inorg Lab > Separation of The Basic Constituents Into groups > Flashcards

Separation of The Basic Constituents Into groups Flashcards

1
Q

What is the group no of Silver?

A

I

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2
Q

What is the group name and no. of Ag^+, Pb^+2, Hg2^+2

A

Silver and I

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3
Q

HCl (2-3 M)

A

Silver (Ag^+, Pb^+2, Hg2^+2)

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4
Q

What is the group no of Hydrogen Sulfide?

A

II

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5
Q

Copper subgroup: Cu^2, Cd^+2, Bi^3, Hg^2
Tin Subgroup: Ag^+3, Sb^+3, Sn^+4

A

Hydrogen Sulfide and I

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6
Q

0.3 M H^+ and H2S (10% thioacetamide)

A

Hydrogen Sulfide

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7
Q

What is the group no of Ammonium Sulfide?

A

III

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8
Q

Aluminum subgroup:
Al+3, Cr+3, Zn+2
Nickel subgroup: Fe+2, Fe+3,Mn+2, Ni+2, Co+2

A

III, Ammoniujm Sulfide

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9
Q

6 M NH4OH and H2S
or (NH4)2S (10%thioacetamide)

A

III Ammonium Sulfied

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10
Q

Group name of IV

A

Alkaline earth

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11
Q

Group member of Alkaline Earth

A

Ba+2, Sr+2, Ca+2, Mg+2

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12
Q

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

A

Precipitant of Alkaline earth IV

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13
Q

Group name of V

A

Alkali

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14
Q

Group member of Alkali

A

Na+, K+, Li+, NH4+

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15
Q

Precipitant of Alkali V

A

None

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16
Q

Cations of this group forms precipitates with dilute HCl

A

I-Silver Group

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17
Q

Ag+, Pb+2, Hg+2

A

I-Silver Group

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18
Q

Composed of metals that do not react with HCl.

A

II- Hydrogen Sulfide Group

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19
Q

They form ppt with H2S in dilute mineral acid.

A

II- Hydrogen Sulfide Group

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20
Q

sulfides of this subgroup
are insoluble in Na2S

A

Copper subgroup

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21
Q

sulfides of this subgroup are
soluble in Na2S

A

Tin subgroup

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22
Q

Cu+2, Cd+2, Bi+3, Hg+2

A

Copper Subgroup

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23
Q

Hg+2, As+3, Sb+3, Sn+2 ,Sn+4

A

Tin Subgroup

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24
Q

Copper Subgroup and Tin Subgroup is what group?

A

II-Hydrogen Sulfide Group

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25
Q

Example of II-Hydrogen Sulfide Group is

A

2Sb+3 + 3H2S → Sb2S3 (orange) + 6H

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26
Q

Example of I-Silver Group

A

Ag+ + Cl- → AgCl (white)

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27
Q

These cations do not react either with dilute HCl or
with H2S in dilute mineral acid medium.

A

III- Ammonium Sulfide Group

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28
Q

they are precipitated by H2S or (NH4)2S in ammoniacal solution.

A

III- Ammonium Sulfide Group

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29
Q

What is the 2 groups of III- Ammonium Sulfide Group?

A

Aluminum subgroup and Nickel Subgroup

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30
Q

sulfides and hydroxides
of this group are soluble in excess NaOH and
Na2O2 mixture

A

Aluminum Subgroup

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31
Q

Al+3, Cr+3, Zn+2

A

Aluminum Subgroup

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32
Q

sulfides and hydroxides of this
group are insoluble in excess NaOH and Na2O2 mixture

A

Nickel Subgroup

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33
Q

Fe+2, Fe+3, Mn+2, Ni+2, Co+2

A

Nickel Subgroup

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34
Q

Example of III-Ammonium Sulfide Group

A

Zn+2 + NH4OH → Zn(OH)2 (white)+ NH4+

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35
Q

These cations do not react with the precipitating agent of Group I-III.

A

IV- Alkaline Earth Group

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36
Q

they form precipitates
with (NH4)2CO3 in the presence of NH4Cl in neutral medium.

A

IV- Alkaline Earth Group

37
Q

The carbonates of this group are completely precipitated by the addition of 95% EtOH

A

IV- Alkaline Earth Group

38
Q

What are elements of IV- Alkaline Earth Group

A

Ba+2, Sr+2, Ca+2, Mg+2

39
Q

Example of IV- Alkaline Earth Group

A

Ba+2 + (NH4)2CO3 → BaCO3 (white)

40
Q

These cations do not react with the precipitating
agents of the previous groups.

A

V-Alkali Group

41
Q

They are found in the last filtrate after the precipitation of the first four group.

A

V-Alkali Group

42
Q

What is V-Alkali Group known as?

A

Soluble group

43
Q

What are elements of V-Alkali Group?

A

Na+, K+, Li+, NH4+

44
Q

What is the color and nature of PbS

A

Black Precipitate

45
Q

What is the color and nature of Bi2S3

A

Dark brown or Brownish black precipitate

46
Q

What is the color and nature of CuS

A

Black Precipitate

47
Q

what does downward arrow mean?

A

Solid Precipitate

48
Q

What is the color and nature of CdS

A

Yellow precipitate

49
Q

What is the solubitility of PbS, Bi2S3, CuS, and CdS in Na2S reagent?

50
Q

What is the color and nature of HgS

A

White - Yellow - Brown - Black precipitate

51
Q

What is the color and nature of Sb2S3

A

Orange/ Reddish orage precipitate

52
Q

What is the color and nature of As2S3

A

Yellow precipitate

53
Q

What is the color and nature SnS

A

Light Brown precipitate

54
Q

What is the color and nature SnS2

A

Yellow precipitate

55
Q

What is the solubility (Na2S) of Na2HgS2, NaSbS4, Na3AsS4, Na2SnS3, Na2SnS3?

A

Colorless solution

56
Q

What is the Fomula of Pb + K2CrO4

57
Q

what is the nature color and nature of PbCrO4

A

Yellow Precipitate

58
Q

What is the formula of Pb + NaOH

A

Na2PbO2 or Pb(OH)4^-2

59
Q

What is the color and nature Na2PbO2 or Pb(OH)4^-2?

A

Yellow solution

60
Q

What is the Formula of Bi + Na2SnO2

61
Q

What is the color and nature of Bi

A

Black Precipitate

62
Q

What is the formula of Cu + K4Fe(CN)6

A

Cu2Fe(CN)6

63
Q

What is the color and nature of Cu2Fe(CN)6

A

Amorphous reddish brown precipitate

64
Q

What is the formula of Cu + NH4OH?

65
Q

What is the color and nature of Cu(OH)NO3

A

Green basic salt

66
Q

What is the formula for Cu + excess NH4OH?

A

Cu(NH3)4 or Cu(NH3)4(OH)2

67
Q

What is the color and nature of Cu(NH3)4 or Cu(NH3)4(OH)2

A

Blue solution

68
Q

What is the formula of Cd + K4Fe(CN)6

A

Cd2Fe(CN)6

69
Q

What is the color and nature of Cd2Fe(CN)6

A

White precipitate

70
Q

What is Formula of Hg + SnCl2

A

Hg2Cl2 –> Hg^0

71
Q

What is the color and nature of Hg2Cl2 –> Hg^0

A

White —-gray precipitate

72
Q

What is the formula of Hg + KI

73
Q

What is the color and nature of HgI2

A

Scarlet red precipitate

74
Q

What is the formula of Hg + excess KI?

A

K2HgI4 or HgI4^-2

75
Q

What is the color and nature of K2HgI4 or HgI4^-2

A

Solution, Colorless solution

76
Q

What is the formula of Sb + Al metal

77
Q

What is the color and nature of Sb^0

A

Black precipitate

78
Q

What is the formula of Sb + NaOBr

79
Q

What is the color and nature of Sb + NaOBr?

80
Q

What is the formula of As + NaOH, Al metal

A

AsH3 + Ag^0

81
Q

What is the color and nature of AsH3 + Ag^0

A

Colorless gas + black precipitate

82
Q

What is the Formula for Sn^+2 + HgCl2

A

Hg2Cl2 –> Hg^0

83
Q

What is the color and nature of Hg2Cl2 –> Hg^0

A

Gray precipitate

84
Q

What is the formula of Sn^4 + Hg metal

85
Q

What is the color and nture of Sn^+2

A

Colorless solution

86
Q

What is the formula of Sn^+4 + HgCl2

A

Hg2Cl2 –>Hg^0

87
Q

What is color and nature of Hg2Cl2 –>Hg^0

A

White-gray precipitate

Inorg Lab (11 decks)

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