C4.2

Question 1

Flame test for lithium

Answer 1

Li+ flame test colour is red

Question 2

Flame test for sodium

Answer 2

Na+ colour of flame is yellow

Question 3

Flame test for potassium

Answer 3

K+ - lilac

Question 4

Flame test for calcium

Answer 4

Orange-red

Question 5

Flame test for copper

Answer 5

Green-blue

Question 6

Flame test

Answer 6

Wire loop , clean it by dipping it into Hcl then rinse it with water so there is no charge
1)Dip clean into solution
2) use handle to hold the loop under flame
3) record the flame colour

Question 7

Hydroxide precipitate for iron 2

Answer 7

Green

Question 8

Hydroxide precipitate for iron 3

Answer 8

Orange - brown

Question 9

Hydroxide for copper

Answer 9

Blue

Question 10

Hydroxide test for calcium

Answer 10

White

Question 11

Hydroxide test for Zink

Answer 11

White

Question 12

Instrumental methods 2 advantages

Answer 12

Very accurate
Can analyse very small amounts of substance

Question 13

Test for chlorine gas

Answer 13

Litmus paper
Blue - white

Question 14

Test for oxygen gas

Answer 14

Splint should relight

Question 15

Test for hydrogen

Answer 15

We will hear a pop

Question 16

Test for CO2 gas

Answer 16

Limewater - cloudy

Question 17

Test for carbonate anion ( negatively charged ion )

Answer 17

Add dilute HCL
Carbonate + acid = salt carbon dioxide + water
Result: CO2 will turn water cloudy

Question 18

Test for Sulfate anion

Answer 18

Solution will make white participate

Question 19

Test for chlorine halide ion

Answer 19

White

Question 20

Test for bromine halide ion cream

Answer 20

Cream

Question 21

Test for iodide halide ion

Answer 21

Yellow