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GCSE Chemistry > Tests for gases and ions > Flashcards

Tests for gases and ions Flashcards

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1
Q

Test for Hydrogen

H2

A

Lit splint
Squeaky pop

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2
Q

Test for Oxygen
O2

A

Glowing splint

Relights

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3
Q

Test for Water
H2O

A

Anhydrous copper sulphate (CuSO4)

Turns from white to blue

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4
Q

Test for Carbon Dioxide

CO2

A

Limewater

Turns cloudy

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5
Q

Test for Ammonia
NH3

A

Damp red litmus

Turns blue

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6
Q

Test for Chlorine

Cl2

A

Damp blue litmus

(Turns red &) bleaches

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7
Q

Test for Lithium ions

Li+

A

Flame test

Red

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8
Q

Test for Sodium ions

Na+

A

Flame test

Yellow

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9
Q

Test for Potassium ions

K+

A

Flame test

Lilac

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10
Q

Test for Calcium ions

Ca2+

A

Flame test

Orange/Red

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11
Q

Test for Copper ions

Cu2+

A

Flame test

Blue/Green

OR

Sodium Hydroxide (NaOH)

Blue precipitate

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12
Q

Test for Iron(II) ions

Fe2+

A

Sodium Hydroxide (NaOH)

Green precipitate

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13
Q

Test for Iron(III) ions

Fe3+

A

Sodium Hydroxide (NaOH)

Brown precipitate

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14
Q

Test for Ammonium ions

NH4+

A 
Sodium Hydroxide (NaOH)…
… then damp red litmus

Turns blue (tests for NH3 gas)

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15
Q

Test for Chloride ions

Cl-

A 
Nitric acid (HNO<sub>3</sub>)…
… then silver nitrate (AgNO<sub>3</sub>)

White precipitate

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16
Q

Test for Bromide ions

Br-

A 
Nitric acid (HNO<sub>3</sub>)…
… then silver nitrate (AgNO<sub>3</sub>)

Cream precipitate

17
Q

Test for Iodide ions

I-

A 
Nitric acid (HNO<sub>3</sub>)…
… then silver nitrate (AgNO<sub>3</sub>)

Yellow precipitate

18
Q

Test for Carbonate ions

Co32-

A

Dilute hydrochloric acid (HCL)…
… then limewater

Turns cloudy

19
Q

Test for Sulphate ions

SO42-

A

Dilute hydrochloric acid (HCL)…
… then barium chloride (BaCl2)

White precipitate

20
Q

Flame test

A

Dip nichrome wire into Hydrochloric acid (HCL)

Dip nichrome wire into sample

Place tip of wire into non-luminous bunsen flame

Observe colour of flame

GCSE Chemistry (18 decks)

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