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Chemistry > Tests > Flashcards

Tests Flashcards

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0
Q

Oxygen gas

A

Relights a glowing splint

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1
Q

Hydrogen gas

A

Mix with air
Ignite
Burns with a squeaky pop

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2
Q

Carbon dioxide gas

A

Bubble through limewater (acid and carbonate)

Turns limewater milky

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3
Q

Chlorine gas

A

Damp litmus paper turns white

Moist starch-iodide paper turns blue

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4
Q

Ammonia gas

A

Heat up with sodium hydroxide in a boiling tube
Damp red litmus paper turns blue
Damp universal indicator paper turns purple

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5
Q

Carbonate ions using dilute acid

A

To the solid or an aqueous solution of it
Add dilute hydrochloric/ nitric acid
Bubbles of gas are formed
The gas formed turns limewater milky

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6
Q

Surface ions by precipitation with barium chloride solution

A

To an aqueous solution of the solid under test
Add dilute hydrochloric acid followed by a few drops of barium chloride
White precipitate of barium sulfate formed

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7
Q

Halide ions by precipitation with silver nitrate solution (anion)

A

Aqueous solution of the solid under test

add some dilute nitric followed by a few drops of silver nitrate solution

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8
Q

Chloride ion (precipitate test)

A

White precipitate

Silver chloride

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9
Q

Bromide ion (precipitate test)

A

Cream precipitate

Sliver bromide

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10
Q

Iodide ion (precipitate test)

A

Yellow precipitate

Silver iodide

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11
Q

Metal cations

A

Metal cations

Most metal cations are insoluble, can be precipitated by adding sodium hydroxide

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12
Q

Copper (ii) (precipitate)

A

Blue precipitate

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13
Q

Iron (ii) (precipitate)

A

Green precipitate

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14
Q

Iron (iii) (precipitate)

A

Brown precipitate

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15
Q

Flame test

A

Metal cations
Platinum or inch nichrome wire dipped into hydrochloric acid (put into Bunsen burner first until has no colour) repeat
then into the solid sample

16
Q

Lithium (flame test)

A

Red

17
Q

Potassium (flame test)

A

Lilac

18
Q

Calcium (flame test)

A

Brick red

19
Q

Sodium (flame test)

A

Yellow/ orange

20
Q

Ammonium ion

A

Add aqueous sodium hydroxide to the solid
Warm the mixture

Ammonium ions presents -> pungent smelling gas produced
Damp red litmus paper goes blue

Chemistry (10 decks)

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