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Chemistry > analysis (further) > Flashcards

analysis (further) Flashcards

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1
Q

(metal ions) FLAME TEST lithium

A

crimson (red)

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2
Q

(metal ions) FLAME TEST sodium

A

yellow

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3
Q

(metal ions) FLAME TEST potassium

A

lilac

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4
Q

(metal ions) FLAME TEST calcium

A

red

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5
Q

(metal ions) FLAME TEST barium

A

green

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6
Q

(metal ions) ADD SODIUM HYDROXIDE aluminium

A

white precipitate

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7
Q

(metal ions) ADD SODIUM HYDROXIDE calcium

A

white precipitate

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8
Q

(metal ions) ADD SODIUM HYDROXIDE magnesium

A

white precipitate

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9
Q

(metal ions) ADD SODIUM HYDROXIDE copper

A

blue precipitate

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10
Q

(metal ions) ADD SODIUM HYDROXIDE iron2

A

green precipitate

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11
Q

(metal ions) ADD SODIUM HYDROXIDE iron3

A

brown precipitate

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12
Q

(nonmetal ions) carbonates

A

add acid, fizz/cloudy

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13
Q

(nonmetal ions) sulphates

A

add barium chloride in nitric acid, white precipitate

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14
Q

(nonmetal ions) halides add silver nitrate CHLORIDE

A

white precipitate

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15
Q

(nonmetal ions) halides add silver nitrate BROMIDE

A

cream precipitate

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16
Q

(nonmetal ions) halides add silver nitrate IODIDE

A

yellow precipitate

17
Q

Do strong acids fully or partially ionise in solution?

A

fully

18
Q

Do weak acids fully or partially ionise in solution?

A

partially

19
Q

How do we test for weak/strong acids?

A

add magnesium, strong acids fizz a lot

20
Q

What does a titration measure?

A

concentration of an unknown acid

21
Q

What is the method of a titration? (5)

A

1) fill burette with alkali
2) put 25cm3 of acid in flask (pipette)
3) add indicator
4) add alkali to acid whilst swirling
5) stop when indicator changes colour

22
Q

What is a reversible reaction?

A

go forwards and backwards until they reach equilibrium

23
Q

What is equilibrium?

A

when the forwards reaction=the backwards reaction

24
Q

At equilibrium, what do the amount of chemicals on each side do?

A

remain constant

25
Q

If we heat it up where does it shift to?

A

endothermic direction to lower the temperature

26
Q

If we cool it down why does it move in the exothermic direction?

A

to raise the temperature

27
Q

If we increase the pressure where does it shift to?

A

the side with the most molecules on

28
Q

Finish the equation for making ammonia: N2 + 3H2 =

A

2NH3

29
Q

Where do we get nitrogen from? (haber process)

A

air

30
Q

Where do we get hydrogen from? (haber process)

A

natural gal

31
Q

What are the ideal conditions to make a high yield of ammonia?

A

200 atmospheres, 450 degrees, iron catalyst

Chemistry (10 decks)

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