(a(i))[2]
Balance the equation that represents the complete combustion of ethanol. $\text{C}_2\text{H}_5\text{OH} + 3\text{O}_2 \rightarrow [BLANK]\text{CO}_2 + [BLANK]\text{H}_2\text{O}$
(a(ii))[2]
Draw an ethanol molecule, making sure that every atom and every bond is shown.
(b(i))[1]
Which of these pH values is alkaline: pH 3, pH 6, pH 7, pH 10?
(b(ii))[2]
Describe the colour change. from [BLANK] to [BLANK]
(b(iii))[2]
Write out the word equation for this reaction.
(c)[1]
State the name of an acidic gas used for food preservation.
(d(i))[2]
Fill in the boxes to label P and Q.
(d(ii))[1]
State the name of the separation method shown.
(d(iii))[1]
On the diagram, place an X to show where the mixture of coloured dyes is added at the start of the experiment.