C8 - Chemical Analysis

Question 1

What is a Formulation

Answer 1

Complex mixture designed to be a useful product

Question 2

Flame test for Lithium ions

Answer 2

Crimson flame

Question 3

Flame test for Sodium ions

Answer 3

Yellow flame

Question 4

Flame test for Potassium ions

Answer 4

Lilac flame

Question 5

Flame test for Calcium ions

Answer 5

Orange-Red flame

Question 6

Flame test for Copper ions

Answer 6

Green flame

Question 7

How to do flame test

Answer 7

Sterilise platinum loop of wire win dilute HCl and burn in blue bunsen flame until no colour.

Question 8

3 metals that form white precipitates when reacting with sodium hydroxide

Answer 8

Magnesium
Aluminium
Calcium

Question 9

Copper ions reaction with sodium hydroxide

Answer 9

Blue precipitate

Question 10

Iron ions reaction with sodium hydroxide

Answer 10

Green precipitate

Question 11

Sodium ions reaction with sodium hydroxide

Answer 11

Brown precipitate

Question 12

3 positives to instrumental methods

Answer 12

Rapid
Sensitive
Accurate

Question 13

Instrumental method for flame test

Answer 13

Flame emission spectroscopy

Question 14

Test for Hydrogen

Answer 14

Burning splint burns rapidly and creates squeaky pop

Question 15

Test for Oxygen

Answer 15

Burning splint relights

Question 16

Test for Carbon Dioxide

Answer 16

Carbon Dioxide bubbling in Limewater (Calcium Hydroxide) turns cloudy

Question 17

Test for Chlorine

Answer 17

Damp litmus paper bleaches and turns white

Question 18

Test for Carbonates

Answer 18

Sample with dilute acid in test tube connected to limewater turns cloudy

Question 19

Test for Sulfates

Answer 19

Drops of Dilute hydrochloric acid and barium chloride in sample makes white precipitate barium sulfate

Question 20

Test for Halides

Answer 20

Drops of dilute nitric acid and silver nitrate forms:
Chloride - white precipitate silver chloride
Bromide - cream precipitate silver bromide
Iodide - Yellow precipitate silver Iodide