analysis (further)

Question 1

(metal ions) FLAME TEST lithium

Answer 1

crimson (red)

Question 2

(metal ions) FLAME TEST sodium

Answer 2

yellow

Question 3

(metal ions) FLAME TEST potassium

Answer 3

lilac

Question 4

(metal ions) FLAME TEST calcium

Answer 4

red

Question 5

(metal ions) FLAME TEST barium

Answer 5

green

Question 6

(metal ions) ADD SODIUM HYDROXIDE aluminium

Answer 6

white precipitate

Question 7

(metal ions) ADD SODIUM HYDROXIDE calcium

Answer 7

white precipitate

Question 8

(metal ions) ADD SODIUM HYDROXIDE magnesium

Answer 8

white precipitate

Question 9

(metal ions) ADD SODIUM HYDROXIDE copper

Answer 9

blue precipitate

Question 10

(metal ions) ADD SODIUM HYDROXIDE iron2

Answer 10

green precipitate

Question 11

(metal ions) ADD SODIUM HYDROXIDE iron3

Answer 11

brown precipitate

Question 12

(nonmetal ions) carbonates

Answer 12

add acid, fizz/cloudy

Question 13

(nonmetal ions) sulphates

Answer 13

add barium chloride in nitric acid, white precipitate

Question 14

(nonmetal ions) halides add silver nitrate CHLORIDE

Answer 14

white precipitate

Question 15

(nonmetal ions) halides add silver nitrate BROMIDE

Answer 15

cream precipitate

Question 16

(nonmetal ions) halides add silver nitrate IODIDE

Answer 16

yellow precipitate

Question 17

Do strong acids fully or partially ionise in solution?

Answer 17

fully

Question 18

Do weak acids fully or partially ionise in solution?

Answer 18

partially

Question 19

How do we test for weak/strong acids?

Answer 19

add magnesium, strong acids fizz a lot

Question 20

What does a titration measure?

Answer 20

concentration of an unknown acid

Question 21

What is the method of a titration? (5)

Answer 21

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

Question 22

What is a reversible reaction?

Answer 22

go forwards and backwards until they reach equilibrium

Question 23

What is equilibrium?

Answer 23

when the forwards reaction=the backwards reaction

Question 24

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

Answer 24

remain constant

Question 25

If we heat it up where does it shift to?

Answer 25

endothermic direction to lower the temperature

Question 26

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

Answer 26

to raise the temperature

Question 27

If we increase the pressure where does it shift to?

Answer 27

the side with the most molecules on

Question 28

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

Answer 28

2NH3

Question 29

Where do we get nitrogen from? (haber process)

Answer 29

air

Question 30

Where do we get hydrogen from? (haber process)

Answer 30

natural gal

Question 31

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

Answer 31

200 atmospheres, 450 degrees, iron catalyst