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Chem CIE > Identification of ions and gases > Flashcards

Identification of ions and gases Flashcards

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1
Q

What is the test for carbonates and what is the result?

A

Test: Add dilute acid, then test for carbon dioxide gas

Test result: Effervescence, carbon dioxide produced

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2
Q

What is the test for halides (Cl-, Br-, and I-)?

A

Test: Acidify with dilute nitric acid, then add silver nitrate

Test result: (Cl- –> White ppt) (Br- —> Cream ppt) (I - —> Yellow ppt)

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3
Q

What is the test for nitrates and what is the result?

A

Test: Add aqueous sodium hydroxide, then aluminum foil; warm carefully

Test result: Ammonia produced

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4
Q

What is the test for sulfates and what is the result?

A

Test: Acidify with dilute nitric acid, then add aqueous barium nitrate

Result: White ppt

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5
Q

What is the test for sulfites and what is the result?

A

Test: Add a small volume of acidified aqueous potassium manganate (VII)

Result: Potassium manganate (VII) changes color from purple to colorless

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6
Q

What is the effect of aqueous sodium hydroxide and ammonia on aluminum?

A

EFFECT of NaOH: White ppt, soluble in excess, and giving a colorless solution

EFFECT of NH3: White ppt, insoluble in excess

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7
Q

What is the effect of aqueous sodium hydroxide on Ammonium?

A

EFFECT of NaOH: Ammonia produced on warming

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8
Q

What is the effect of aqueous sodium hydroxide and ammonia on Calcium?

A

EFFECT of NaOH: White ppt, insoluble in excess

EFFECT of NH3: No ppt, or very slight white ppt

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9
Q

What is the effect of aqueous sodium hydroxide and ammonia on Chromium?

A

EFFECT of NaOH: Green ppt, soluble in excess

EFFECT of NH3: Green ppt, insoluble in excess

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10
Q

What is the effect of aqueous sodium hydroxide and ammonia on Copper (II)?

A

EFFECTof NaOH: Light blue ppt, insoluble in excess

EFFECT of NH3: Light blue ppt, soluble in excess, giving a dark blue solution

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11
Q

What is the effect of aqueous sodium hydroxide and ammonia on Iron(II)?

A

EFFECT of NaOH: Green ppt, insoluble in excess, ppt. turns brown near the surface on standing

EFFECT of NH3: Green ppt, insoluble in excess, ppt. turns brown near the surface on standing

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12
Q

What is the effect of aqueous sodium hydroxide and ammonia on Iron(III)?

A

EFFECT of NaOH: Red-brown ppt, insoluble in excess

EFFECT of NH3: Red-brown ppt, insoluble in excess

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13
Q

What is the effect of aqueous sodium hydroxide and ammonia on Zinc?

A

EFFECT of NaOH: White ppt, soluble in excess, giving a colorless solution

EFFECT of NH3: White ppt, soluble in excess, giving a colorless solution

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14
Q

What is the test for ammonia and what is the result?

A

Test + result: Turns damp red litmus paper blue

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15
Q

What is the test for carbon dioxide and what is the result?

A

Test + result: Turns limewater milky

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16
Q

What is the test for Chlorine and what is the result?

A

Test + result: Bleaches damp litmus paper

17
Q

What is the test for hydrogen and what is the result?

A

Test + result: ‘pops’ with a lighted splint\

18
Q

What is the test for oxygen and what is the result?

A

Test + result: Relights a glowing splint

19
Q

What is the test for Sulfur dioxide and what is the result?

A

Test + result: Turns acidified aqueous potassium manganate (VII) from purple to colorless

20
Q

What is the flame color for Lithium, Li+?

A

Red

21
Q

What is the flame color for sodium, Na+?

A

Yellow

22
Q

What is the flame color for potassium, K+?

A

Lilac

23
Q

What is the flame color for Calcium, Ca 2+?

A

Orange-red

24
Q

What is the flame color for Barium, Ba 2+?

A

Light green

25
Q

What is the flame color for Copper(II), Cu 2+?

A

Blue-green

Chem CIE (3 decks)

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