Unit 5 Practical

Question 1

Lithium flame test

Answer 1

Red

Question 2

Sodium flame test

Answer 2

Yellow

Question 3

Potassium flame test

Answer 3

Lilac

Question 4

Copper flame test

Answer 4

Blue-green

Question 5

Barium flame test

Answer 5

Apple green

Question 6

Calcium flame test

Answer 6

Orange red

Question 7

Strontium flame test

Answer 7

Crimson

Question 8

Rubidium flame test

Answer 8

Violet- red

Question 9

Lead flame test

Answer 9

Grey

Question 10

Magnesium flame test

Answer 10

White

Question 11

Caesium flame test

Answer 11

Blue-violet

Question 12

Test for sulphates?

Answer 12

HCl + BaNO3 - white ppt

Question 13

What are the 2 carbonate tests?

Answer 13

Acid - fizzing
Limewater - cloudy

Question 14

Test for nitrates?

Answer 14

Iron (III) sulphate + H2So4 - brown ring

Question 15

What are the halide tests?

Answer 15

Nitric acid + silver nitrate -
chlorine = white
bromine = cream
iodine = pale yellow

Question 16

Copper ppt colour

Answer 16

Blue

Question 17

Iron (II) ppt colour

Answer 17

Green

Question 18

Iron (III) ppt colour

Answer 18

Brown

Question 19

Chromium ppt colour

Answer 19

grey/ green

Question 20

Magnesium ppt colour

Answer 20

White

Question 21

Aluminium ppt colour

Answer 21

White - dissolves in excess NaOH

Question 22

Zinc ppt colour

Answer 22

White - dissolves in excess NaOH and NH3

Question 23

Lead ppt colour

Answer 23

White

Question 24

What are the 3 gas tests?

Answer 24

hydrogen - squeaky pop test
oxygen - relights glowing splint
carbon dioxide - splint goes out, limewater

Question 25

How to test for alkene?

Answer 25

Bromine water Orange to colourless

Question 26

How to test for halogenalkanes?

Answer 26

Sodium hydroxide Nitric acid/ silver nitrate Cl - white Br - cream I - yellow

Question 27

How to test for primary and secondary alcohols?

Answer 27

Warm dichromate - orange PCl5 - white fumes Carboxylic acid + sulphuric acid - sweet smell (ester)

Question 28

How to test for aldehydes?

Answer 28

Tollens - silver Fehlings - blue to red Dichromate - orange to green

Question 29

How to test for carboxylic acids?

Answer 29

Carbonate - fizzing Limewater - clear to cloudy

Question 30

How to test for phenol?

Answer 30

Iron (III) chloride solution - clear to purple

Question 31

What are the soluable compounds?

Answer 31

NAG SAG Nitrates (NO3) Acetates (C2H3O2) Group 1 (Li+, Na+ ect) Sulfates (SO42) Ammonium (NH4+) Group 7 (F-,Cl- ect)

Question 32

What are the exceptions to soluable compounds?

Answer 32

PMS and Castro Bear P (pb2+, lead) M (mercury, Hg2+) S (silver, ag+) Ca2+ Sr2+ Ba 2+