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chem lab > cation group analysis > Flashcards

cation group analysis Flashcards

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1
Q

DETECTION OF PRESENCE OF ELEMENT IN SAMPLE MATERIAL

A

cation analysis

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2
Q

CATION ANALYSIS IS ACCOMPLISHED THROUGH __________ REACTION BY ADDING GROUP REAGENTS

A

precipitation

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3
Q

group 1 cations

A

hydrocholic acids

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4
Q

group 2 cations

A

hydrogen sulfide

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5
Q

group 3 cations

A

ammonium sulfide

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6
Q

group 4 cations

A

ammonium carbonate

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7
Q

group 5 cations

A

soluble group

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8
Q

hydrochloric acid is aka

A

silver group

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9
Q

precipitates with HS2 in dilute mineral acid medium

A

hydrogen sulfide

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10
Q

precipitates with dilute HCl

A

hydrochloric acid

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11
Q

is an insoluble solid that emerges from a liquid solution; chemical reaction between liquids

A

precipitate

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12
Q

form precipitates with ammonium sulfide in neutral or ammoniacal medium

A

ammonium sulfide

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13
Q

2 subgroups of ammonium sulfide

A

aluminum subgroup and iron subgroup

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14
Q

a group under ammonium sulfide that is amphoteric hydroxides; insoluble BUT dissolves in excess of sodium hydroxide

A

aluminum subgroup

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15
Q

insoluble in the excess of the alkali.

A

iron subgroup

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16
Q

elements under aluminum subroup

A

Al3+, Zn3+, Cr2+

17
Q

elements under iron subgroup

A

Fe2+, Fe3+ Mn2+, Co2+, Ni2+

18
Q

precipitates with ammonium carbonate in the presence of chloride in a neutral medium

A

ammonium carbonate

19
Q

do not react with mentioned reagents

A

soluble group

20
Q

elements under hydrochloric acid

A

Ag, Pb+2, Hg+2

21
Q

2 subgroups of hydrogen sulfide

A

copper and tin subgroup

22
Q

a subgroup under hydrogen sulfide that’s insoluble in sodium sulfide reagents

A

copper subgroup

23
Q

a subgroup under hydrogen sulfide that’s soluble in sodium sulfide reagents

A

tin subgroup

24
Q

elements under copper subgroup

A

Pb, Cu, Cd, Bi

25
Q

elements under tin subgroup

A

Hg+2, Sn+2, Sn+4, As+3, As+5, Sb+3, Sb+5

26
Q

elements under ammonium carbonate

A

Mg2+, Ca2+, Sr2+, Ba2+

27
Q

elements under group5 cations

A

Li+, Na+, K+, NH4+

28
Q
A

chem lab (5 decks)

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