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Chemistry > Paper 6 Question 3 > Flashcards

Paper 6 Question 3 Flashcards

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1
Q 
Test for (anion) carbonate 
(CO32–)
A

Test add dilute acid

Result effervescence, carbon dioxide produced

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2
Q 
Test for (anion) chloride (Cl –)
[in solution]
A

Test acidify with dilute nitric acid, then add
aqueous silver nitrate

Result white ppt.

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3
Q 
Test for (anion) bromide (Br–)
[in solution]
A

Test acidify with dilute nitric acid, then add
aqueous silver nitrate

Result cream ppt.

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4
Q 
Test for (anion)  iodide (I–)
[in solution]
A

Test acidify with dilute nitric acid, then add
aqueous silver nitrate

Result yellow ppt.

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5
Q 
Test for (anion) nitrate (NO3–)
[in solution]
A

Test add aqueous sodium hydroxide, then
aluminium foil; warm carefully

Result ammonia produced

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6
Q 
Test for (anion) sulfate (SO4 2–)
[in solution]
A

Test acidify, then add aqueous barium nitrate

Result white ppt

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7
Q

Test for (anion) sulfite (SO3 2–)

A

Test add dilute hydrochloric acid, warm gently
and test for the presence of sulfur dioxide

Result sulfur dioxide produced will turn acidified
aqueous potassium manganate(VII) from
purple to colourless

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8
Q

Test for (cation) aluminium (Al 3+)

A

Effect of aqueous sodium hydroxide

white ppt., soluble in excess, giving a
colourless solution

Effect of aqueous ammonia

white ppt., insoluble in excess

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9
Q

Test for (cation) ammonium (NH4+)

A

Effect of aqueous sodium hydroxide

ammonia produced on warming

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10
Q

Test for (cation) calcium (Ca2+)

A

Effect of aqueous sodium hydroxide

white ppt., insoluble in excess

Effect of aqueous ammonia

no ppt. or very slight white ppt

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11
Q

Test for (cation) chromium(III) (Cr3+)

A

Effect of aqueous sodium hydroxide

green ppt., soluble in excess

Effect of aqueous ammonia

grey-green ppt., insoluble in excess

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12
Q

Test for (cation) copper(II) (Cu2+) in solution

A

Effect of aqueous sodium hydroxide

light blue ppt., insoluble in excess

Effect of aqueous ammonia

light blue ppt., soluble in excess, giving a
dark blue solution

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13
Q

Test for (cation) iron(II) (Fe2+)

A

Effect of aqueous sodium hydroxide

green ppt., insoluble in excess

Effect of aqueous ammonia

green ppt., insoluble in excess

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14
Q

Test for (cation) iron(III) (Fe3+)

A

Effect of aqueous sodium hydroxide

red-brown ppt., insoluble in excess

Effect of aqueous ammonia

red-brown ppt., insoluble in excess

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15
Q

Test for (cation) zinc (Zn2+)

A

Effect of aqueous sodium hydroxide

white ppt., soluble in excess, giving a
colourless solution

Effect of aqueous ammonia

white ppt., soluble in excess, giving a
colourless solution

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16
Q

Tests for (gas) ammonia (NH3)

A

turns damp red litmus paper blue

17
Q

Tests for (gas) carbon dioxide (CO2

A

turns limewater milky

18
Q

Tests for (gas) chlorine (Cl2)

A

bleaches damp litmus paper

19
Q

Tests for (gas) hydrogen (H2)

A

‘pops’ with a lighted splint

20
Q

Tests for (gas) oxygen (O2)

A

relights a glowing splint

21
Q

Tests for (gas) sulfur dioxide (SO2)

A

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

22
Q

Test for (ion) lithium (Li+)

A

red flame

23
Q

Test for (ion) sodium (Na+)

A

yellow flame

24
Q

Test for (ion) potassium (K+)

A

lilac flame

25
Q

Test for (ion) copper(II) (Cu2+)

A

blue-green flame

Chemistry (3 decks)

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