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Anachem Prelim > Cation 1 > Flashcards

Cation 1 Flashcards

1
Q

GROUP CATIONS:

A

• Silver (Ag^+) lons
• Lead (I|) (Pb2^+) lons - Plumbous
• Mercurous (H2^2) lons - polyatomic ion!

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2
Q

INSOLUBLE CHLORIDES

A

Lead Chloride (PbCl2)
Silver Chloride (AgCI)
Mercurous Chloride (Hg2Cl2)

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3
Q

FIRST STEP

A

The group is precipitated with dilute
HCI (Hydrochloric acid) as insoluble chlorides.

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4
Q

SECOND STEP

A

Lead chloride is removed from the precipitate by leaching with hot water.

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5
Q

THIRD STEP

A

The separation of AgCl from Hg2Cl2 with ammonia water.

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6
Q

will tell us gaano ka soluble ang substance.

A

Solubility Product Constant K sp

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7
Q

describes the equilibrium between a solid and its constituent ions in a solution.

A

Solubility Product Constant

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8
Q

identifies the degree to which the compound can dissociate in water.

A

Ksp

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9
Q

The _____ the Ksp, the more soluble the compound is.

A

higher

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10
Q

White precipitate obtained in Procedure 1 may be

A

PbCl2
AgCl
Hg2Cl2

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11
Q

First centrifugate may contain

A

Pb^2+

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12
Q

Potassium Chromate

A

K2 CrO4

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13
Q

K2 CrO4

A

Potassium Chromate

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14
Q

Confirmatory reagent for lead (Pb^2+)

A

K2 CrO4

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15
Q

Color confirming the presence of Pb2+

A

Yellow

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16
Q

PROCEDURE 2B
Test for Residue/Precipitate may contain

A

AgCl
Hg2Cl2

17
Q

What is the separator reagent pf Silver chloride and Mercurous chloride

A

3M NH4OH

Ammonium water ( Ammonium hydroxide)

18
Q

blackening of the residue indicates the presence of the

A

MERCUROUS ION

19
Q

Centrifugate from 2B may contain

A

Ag(NH3)^2+
(Silver(I) diammine cation)

20
Q

Confirmatory reagent of Silver cations

A

3M HNO3
Nitric Acid

21
Q

confirms presence of SILVER ION.

A

Formation of a white precipitate

22
Q

Confirmatory reagent of Mercurous cation

A

Stannous Chloride - SnCl2

23
Q

confirms presence of MERCUROUS ION.

A

White or gray precipitate

24
Q

Group 1 cations are separated from other cations when precipitated with

A

dilute hydrochloric acid

25
Q

has high solubility in water.

A

Lead chloride

26
Q

Lead Chloride easily becomes soluble when dissolve in

A

hot water

27
Q

Centrifugate contains

A

plumbous ion

28
Q

Confirmation for Lead (II) ion:
Precipitating agent:

A

Potassium chromate

29
Q

Chemical formula of yellow precipitate

A

PbCrO4

30
Q

Precipitate contains

A

silver and mercurous ion

31
Q

Separating agent: Silver and Mercurous

A

Dilute Ammonia

32
Q

True or False: Silver is soluble

A

True

33
Q

Confirmation for Silver ion:
Precipitating agent:

A

Nitric Acid

34
Q

Chemical formula of white precipitate

A

AgCI

35
Q

Confirmation for Mercurous ion:
Precipitating agent:

A

Stannous chloride

36
Q

Chemical formula of black precipitate

A

Hg

Anachem Prelim (3 decks)

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