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Chemistry 0620 > Qualitative Analysis Sheet > Flashcards

Qualitative Analysis Sheet Flashcards

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1
Q

Tests for Anion

Carbonate CO3^2-

A

add dilute acid, then test for carbon dioxide gas
effervesence; CO2 produced

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2
Q

Chloride, Cl^-

A

acidify with dilute nitric acid, then add aqueous silver nitrate
white ppt.

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3
Q

Bromine Br^-

A

acidify with dilute nitric acid, then add aqueous silver nitrate
cream ppt.

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4
Q

Iodide, I^−

A

acidify with dilute nitric acid, then add aqueous silver nitrate
yellow ppt.

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5
Q

Nitrate, NO3^-

A

add aqueous sodium hydroxide, then aluminium foil; warm carefully
ammonia produced

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6
Q

Sulfate, SO4^2-

A

acidify with dilute nitric acid, then add aqueous barium nitrate
white ppt

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7
Q

sulfite, SO3^2-

A

add a small volume of acidified aqueous potassium manganate(VII)
the acidified aqueous potassium manganate (VII) changes
colour from purple to colourless

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8
Q

Test for aqueous cations

Aluminium,
Al 3+

A

aqueous sodium hydroxide - white ppt., soluble in excess, giving a colourless solution
aqueous ammonia - white ppt., insoluble in excess

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9
Q

Test for aqueous cations

ammonium
NH4^+

A

aqueous sodium hydroxide - ammonia produced on warming
aqueous ammonia -

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10
Q

Test for aqueous cations

calcium, Ca2+

A

aqueous sodium hydroxide - white ppt., insoluble in excess
aqueous ammonia - no ppt. or very slight white ppt.

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11
Q

Test for aqueous cations

chromium(III), Cr3+

A

aqueous sodium hydroxide - green ppt., soluble in excess
aqueous ammonia - green ppt., insoluble in excess

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12
Q

Test for aqueous cations

copper(II), Cu2+

A

aqueous sodium hydroxide - light blue ppt., insoluble in excess
aqueous ammonia - light blue ppt., soluble in excess, giving a dark blue solution

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13
Q

Test for aqueous cations

iron(II), Fe2+

A

aqueous sodium hydroxide - green ppt., insoluble in excess, ppt. turns brown near surface on standing
aqueous ammonia - green ppt., insoluble in excess, ppt. turns brown near surface on standing

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14
Q

Test for aqueous cations

iron(III), Fe3+

A

aqueous sodium hydroxide - red-brown ppt., insoluble in excess
aqueous ammonia - red-brown ppt., insoluble in excess

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15
Q

Test for aqueous cations

zinc, Zn2+

A

aqueous sodium hydroxide - white ppt., soluble in excess, giving a colourless solution
aqueous ammonia - white ppt., soluble in excess, giving a colourless solution

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16
Q

Test for gases

ammonia, NH3

A

turns damp red litmus paper blue

17
Q

Test for gases

carbon dioxide, CO2

A

turns limewater milky

18
Q

Test for gases

chlorine, Cl 2

A

bleaches damp litmus paper

19
Q

Test for gases

hydrogen, H2

A

‘pops’ with a lighted splint

20
Q

Test for gases

oxygen, O2

A

relights a glowing splint

21
Q

Tests for gases

sulfur dioxide, SO2

A

turns acidified aqueous potassium manganate(VII) from purple to colourless

22
Q

Flame tests

lithium, Li+

A

Red

23
Q

Flame tests

sodium, Na+

A

Yellow

24
Q

Flame tests

potassium, K+

A

Lilac

25
Q

Flame tests

calcium, Ca2+

A

Orange-red

26
Q

Flame test

Barium, Ba2+

A

Light-green

27
Q

Flame tests

copper(II), Cu2+

A

Blue-green

Chemistry 0620 (2 decks)

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