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Chemisty Triple Science > C8-Chemical Analysis > Flashcards

C8-Chemical Analysis Flashcards

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1
Q

What are formulations

A

Are mixtures of certain quantities of substances designed to fulfil a specific purpose

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2
Q

Examples of formulations

A

Paints
Fuels
Alloys
Fertilisers

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3
Q

How can we test if a substance is pure

A

Test the melting and boiling points

Should be very precise

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4
Q

What is chromatography

A

The separation of a mixture to identify its constituents substances

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5
Q

What is the mobile phase in chromatography

A

The solvent (water) moving up the paper

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6
Q

What is the stationary phase in chromatography

A

The filter paper

Due to capillary action

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7
Q

What does chromatography do (in depth)

A

Pulls the substances in the mixture upwards

with lighter particles being moved further upwards at the stationary phase

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8
Q

What is the formula to calculate Rf value

A

Distance substance moved——————————————
Distance mobile phase moved

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9
Q

How can you test for HYDROGEN

A

Lit splint produces a squeaky pop

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10
Q

How can you test for oxygen

A

Will delight a glowing splint

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11
Q

How can you test for carbon dioxide

A

Causes limewater to turn cloudy when bubbled through it

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12
Q

How can you test for chlorine

A

Bleaches blue litmus paper

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13
Q

How can you test for metals

A

Flame test

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14
Q

Lithium flame colour …..

A

Crimson

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15
Q

Sodium flame colour

A

Yellow

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16
Q

Potassium flame colour

A

Lilac

17
Q

Calcium flame colour

A

Orange-red

18
Q

Copper flame colour

A

Green

19
Q

How can you test for metal ions in solution

A

Add SODIUM HYDROXIDE to make a metal hydroxide

20
Q

What colour does Copper (II) make

A

Blue precipitate

21
Q

What colour does Iron (II) make

A

Green precipitate

22
Q

What colour does Iron (III) make

A

Brown precipitate

23
Q

What colour does aluminium/calcium and magnesium make

A

White precipitate

24
Q

How can you find aluminium

A

White precipitate will dissolve if excess of sodium hydroxide has been added

25
Q

Carbonates react with acid to make

A

Carbon dioxide

26
Q

How will halide ions produce a precipitate

A

When mixed with Silver Nitrate and Nitric Acid

27
Q

What colour is chlorine ions when it is mixed with silver nitrate and nitric acid

A

White

28
Q

What colour is bromine ions when it is mixed with silver nitrate and nitric acid

A

Cream

29
Q

What colour is iodine ions when it is mixed with silver nitrate and nitric acid

A

Yellow

30
Q

Sulphate ions will produce a white precipitate when mixed with…

A

Barium Chloride & Hydrochloric Acid

Chemisty Triple Science (10 decks)

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