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Ani Tutoring > Chemistry Tests > Flashcards

Chemistry Tests Flashcards

1
Q

Ammonia gas

A

Damp red litmus paper turns blue

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2
Q

Carbon dioxide gas

A

Bubble through limewater. Limewater turns milky/ cloudy

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3
Q

Chlorine gas

A

Damp blue litmus paper is bleached

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4
Q

Hydrogen gas

A

Hold a lit splint at the mouth of the test tube. Squeaky pop sound heard

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5
Q

Oxygen gas

A

Hold a glowing splint. Splint relights

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6
Q

Li+

A

Red flame

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7
Q

Na+

A

Yellow flame

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8
Q

K+

A

Lilac flame

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9
Q

Ca 2+

A

Orange red flame

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10
Q

Cu 2+

A

Blue green flame

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11
Q

Ammonium ions

A

Add sodium hydroxide. Ammonia gas produced. Ammonia gas turns damp red litmus paper blue

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12
Q

Copper (II) ions

A

Add sodium hydroxide. Light blue precipitate forms

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13
Q

Iron(II) ions

A

Add sodium hydroxide. Green precipitate forms

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14
Q

Iron(III) ions

A

Add sodium hydroxide. Red brown precipitate forms

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15
Q

Carbonate ions

A

Add dilute acid. Bubble gas produced through limewater. Limewater turns milky/ cloudy

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16
Q

Chloride ions

A

Add dilute nitric acid followed by aqueous silver nitrate. White precipitate forms

17
Q

Bromide ions

A

Add dilute nitric acid followed by aqueous silver nitrate. Cream precipitate forms

18
Q

Iodide ions

A

Add dilute nitric acid followed by aqueous silver nitrate. Yellow precipitate forms

19
Q

Sulfate ions

A

Add dilute nitric acid followed by aqueous barium nitrate. White precipitate forms

20
Q

Chemical test for water

A

Anhydrous copper(II) sulfate turns from white to blue on addition of water

21
Q

Physical test for water

A

Measure boiling point. Boiling point should be 100 degrees C for pure water

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