1.1. A student wants to separate ethanol from a mixture of ethanol and water.

Which apparatus is used for this separation?

1.2. The melting and boiling points of certain substances are shown in Figure 4.

Figure 4

i) Identify the substance likely to be a mixture.

[1]

ii) Give one reason for your choice in part (i).

[1]

1.3. i) i) Why is no boiling point given for substance B?

[1]

ii) Describe the movement and arrangement of the particles in substance B at 350 °C.

[2]

1.4. Substance D is dissolved in substance C to form a solution.

The solution is separated using simple distillation.

Describe how simple distillation can be used to separate substance C from the solution.

Your answer should include:

• the apparatus used

• the changes of state occurring

• an explanation of why the separation is successful, using the data in Figure 4