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Chemistry > Analysis > Flashcards

Analysis Flashcards

1
Q

What colour flame does the cation

Na+ (Sodium) have ?

A

An intense yellow flame

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2
Q

What colour flame does the cation

Li+ (Lithium) have ?

A

A red flame

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3
Q

What colour flame does the cation

Ca+ (Calcium) have?

A

A brick red flame

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4
Q

What is the test and result used to identify the ammonium (NH4+ ) ion.

A

Add sodium hydroxide to the solution or solid.
It will give a pungent smelling gas
that should turn red litmus paper blue

  • this is ammonia
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5
Q

Copper(II) and sodium hydroxide form?

A

A blue precipitate

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6
Q

Iron (II) and sodium hydroxide

A

Mossy green precipitate

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7
Q

Iron (III) and sodium hydroxide

A

A foxy red precipitate

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8
Q

What colour flame does the cation

K+ (Potassium) have ?

A

A lilac flame

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9
Q

To identify anions add what?

A

Dilute Nitric acid

Silver nitrate solution

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10
Q

Dilute nitric acid + silver nitrate + chloride (cl-) = ?

A

A White precipitate of silver chloride

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11
Q

Dilute nitric acid + silver nitrate + Bromide (Br-) = ?

A

A cream precipitate of silver bromide

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12
Q

Dilute nitric acid + silver nitrate + Iodide (I-) = ?

A

A yellow precipitate of silver iodide

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13
Q

What is the test to find sulphate ions (SO4 2-)?

And what is the result?

A

To an aqueous solution of substance being tested add
Dilute Hydrochloric acid and
Barium chloride solution

The result is a white precipitate of barium sulfate

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14
Q

What is the test to find carbonate ions?

And what is the result?

A

To the solid or solution add
Dilute Hydrochloric acid
or dilute nitric acid

The result is bubbles of gas which turns the
limewater milky

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15
Q

What is the test for hydrogen ? And the result?

A

Mix with air and ignite ( put a lit splint in the hydrogen)

A squeaky pop

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16
Q

What is the test for oxygen ? And what is the result ?

A

Put a glowing splint in oxygen source

If the glowing splint relights
Oxygen is present

17
Q

What is the test for carbon dioxide ? And what is the result?

A

Bubble the gas through limewater

If the limewater turns milky (because of CaCO3)
Carbon dioxide is present

18
Q

What is the test for chlorine and the result ?

A

Test with damp litmus paper

Result - it bleaches the litmus paper so it turns white

19
Q

What is the test for ammonia and the result ?

A

Use damp red litmus paper

And if ammonia is present it turns blue

Chemistry (5 decks)

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