Chemical analysis

Question 1

What is formulation

Answer 1

A mixture made for a specific purpose (eg fuels, inks)

Question 2

What test can you identify inks by

Answer 2

Chromatography

Question 3

What happens in the hydrogen gas test

Answer 3

Sneaky pop test, a pop with a lit splint in a tube

Question 4

What happens in the oxygen gas test

Answer 4

Splint is relight - glowing

Question 5

What is carbon dioxide gas test

Answer 5

Turning limewater cloudy

Question 6

What is the choline test

Answer 6

Damp blue Litmus paper changes colour to white

Question 7

The flame test results

Answer 7

Barium - green
Calcium - orange/red
Copper - blue
Lithium - crimson red
Sodium - orange
Potassium - lilac

Question 8

What happens in precipitate test

Answer 8

Add excess NaOH to solution and if solid is formed, means its a precipitate

Question 9

Precipitate test results

Answer 9

Aluminium - white
Magnesium - white
Calcium - white
Iron III - brown
Iron II - green

Question 10

Non-metal ion test results

Answer 10

CO3 - adding acid and bubbles formed
Cl - add nitric acid forming white precipitate
Br - add acid forming cream precipitate
I - add silver nitrate forming yellow precipitate