1.1. Extended Only

Ethanoic acid is a colourless liquid at room temperature. It has the typical acid properties and forms compounds called ethanoates.

A pure sample of ethanoic acid is slowly heated from 0 ^oC to 150 ^oC and its temperature is measured every minute. The results are represented on the graph below.

i) Name the change that occurs in the region D to E.

[1]

ii) What would be the difference in the region B to C if an impure sample had been used?

[1]

iii) Sketch on the graph how the line would continue if the acid was heated to a higher temperature.

[1]

iv) Complete the following table that compares the separation and movement of the molecules in regions C to D with those in E to F.

[5]

1.2. Complete the word equations for the reactions of ethanoic acid.

calcium + ethanoic acid → ................................................ +  .........................................

................................................  +  ethanoic acid   →  zinc ethanoate + water

1.3. Write the symbol equation for the reaction between ethanoic acid and sodium hydroxide.