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Chem Qs > Flame Tests And Precipitates > Flashcards

Flame Tests And Precipitates Flashcards

1
Q

What is a cation

A

A positive ion

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2
Q

What is an anion

A

A negative ion

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3
Q

What colour flame does copper make

A

Green

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4
Q

What colour flame will sodium ions produce

A

Yellow

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5
Q

What colour flame will calcium ions

A

Brick red

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6
Q

What colour flame will lithium ions produce

A

Crimson

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7
Q

What colour flame will potassium ions produce

A

Lilac

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8
Q

What reagent do we use to test for metal ions

A

Sodium hydroxide NaOH

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9
Q

What colour precipitate will copper ions produce

A

Blue

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10
Q

What colour precipitate does magnesium ions make

A

White

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11
Q

What colour precipitate does calcium ions produce

A

White

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12
Q

What colour precipitate will aluminium ions produce

A

White

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13
Q

What colour precipitate will Fe2+ ions produce

A

Green

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14
Q

What colour precipitate will Fe3+ produce

A

Brown

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15
Q

How can u tell the difference between white precipitate of magnesium or calcium and the white precipitate of aluminium

A

Al3+ ions will redisolve in excess NaOH magnesium and calcium ions will not

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16
Q

What reagent do we use to test for sulfate ions

A

Acidified barium chloride

17
Q

What is the formula for sulfate ions

A

SO4 2-

18
Q

What colour precipitate do sulfate ions make in acidified barium chloride

A

White

19
Q

What reagents do we use for a carbonate test

A

Acid

20
Q

What is the positive test for a carbonate test

A

Bubbles of CO2

21
Q

What happens to limewater if co2 is present

A

It turns cloudy

22
Q

What is the test for chlorine

A

Damp blue litmus paper

23
Q

What is the positive result for the chlorine test

A

Bleaches damp blue litmus paper white

24
Q

How do u calculate rf value

A

Distance moved by dot divided by distance moved by solvent

25
Q

What must we draw the start line in chromatography test with a pencil

A

So it doesn’t move up the page

26
Q

What elements make up the halogens

A

Fluorine chlorine bromine iodine

27
Q

What reagent t is used to test for halide ions

A

Acidified silver nitrate

28
Q

What colour precipitate do Cl ions make with acidified silver nitrate

A

White

29
Q

What colour precipitate do Br ions make with acidified silver nitrate

A

Cream

30
Q

What colour precipitate do I ions make with acidified silver nitrate

A

Yellow

Chem Qs (1 decks)

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