Chemical Analysis

Question 1

What is a pure substance?

Answer 1

a single element or compound not mixed with any other substances. For example, water or gold. It has a specific melting or boiling point.

Question 2

Testing for water (a pure substance).

Answer 2

• Melting point = 0°c
• Boiling point = 100°c

Question 3

Anhydrous copper (II) sulfate

Answer 3

A white solid - used as a chemical test for water
→ white solid turns blue

Question 4

Examples of mixtures

Answer 4

① paracetamol
② asboric acid
③ sucrose
④ aspartame

Question 5

What is an alloy?

Answer 5

A mixture of two or more elements, one of which is metal → results in metallic properties

Question 6

What is a formulation?

Answer 6

A mixture Winn is designed to be a useful product and is formed by mixing several different substances in specific quantities to ensure certain properties

Question 7

Soluble

Answer 7

Dissolves in water

Question 8

Insoluble

Answer 8

Doesn’t dissolve in water

Question 9

Solute

Answer 9

Substance which dissolves

Question 10

Solvent

Answer 10

The liquid in which the solute dissolves

Question 11

Solution

Answer 11

Mixture of solute dissolved in a solvent

Question 12

Residue

Answer 12

The solid that remains

Question 13

Filtrate

Answer 13

The filtered solution

Question 14

Distillate

Answer 14

The liquid that’s cooled from the vapour and collected during distillation

Question 15

Miscible

Answer 15

Liquids that mix

Question 16

Immiscible

Answer 16

Liquids that don’t mix

Question 17

Evaporation

Answer 17

Change of state from liquid to gas when heated

Question 18

Condestation

Answer 18

Change in state of gas to liquid