Ethanol acts as a reducing agent. If it is warmed with acidified aqueous potassium manganate(VII), it can be oxidised. It also evaporates readily at room temperature. As a solvent, it can be used to separate the dyes found in ink. A student uses the apparatus illustrated to perform the separation. The diagram contains errors.
(a)[1]
State the colour change of potassium manganate(VII) in this experiment. from [BLANK] to [BLANK].
(b(i))[1]
Name the method used to separate the dyes in ink.
(b(ii))[2]
State two faults shown in the diagram.
(c)[1]
Suggest one safety precaution that the student should take to reduce the risk when using ethanol.
Worked solution & mark scheme
This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Purple/pink changes to colourless or decolourised” …