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Inorganic Chemistry (Lab) > Cation I, II, III > Flashcards

Cation I, II, III Flashcards

1
Q

What reagents precipitate group 1 cations?

A

HCl

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2
Q

What cation is soluble to water?

What color is the confirmatory of the presence of it?

A

Lead

Yellow

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3
Q

What reagent confirms the presence of lead?

A

K2CrO4

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4
Q

What two Group 1 cations are insoluble chlorides?

A

Ag and Hg

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5
Q

What reagent establishes the presence of Ag?

A

NH3

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6
Q

What reagent establishes the presence of Ag?

A

White to black

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7
Q

What reagent establishes the presence of Ag?

A

HNO3 (nitric acid)

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8
Q

What pH are group II cations insoluble in?

A

.5 pH

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9
Q

What precipitating reagent is used in group II cations?

A

Thioacetamide

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10
Q

What is used to separate the insoluble sulfides into two groups?

A

NaOH

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11
Q

What sulfides form hydroxo-complexes?

A

Sn (Tin) and Sb (Antimony)

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12
Q

What confirms the presence of Sn2+?

A

HgCl2

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13
Q

What is oxalic acid for?

A

It is to prevent the interference of Sn4+ and Sb3+ by oxidation

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14
Q

What separates copper and bismuth?

A

NH3

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15
Q

What reagent is used to test for the presence of Bismuth?

A

HCl

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16
Q

What color confirms the presence of Bismuth?

A

White

17
Q

What is the reagent of copper?

A

NH3

18
Q

What reagent treats group III cations?

A

NaOH

19
Q

What is OCl for?

A

Oxidises Cr3+ to form a hydroxo-complex along with Al

20
Q

What is the color for the insoluble hydroxide of nickel?

A

Green

Inorganic Chemistry (Lab) (1 decks)

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