GCSE / O Levels Chemistry

A paper chromatography experiment is carried out to find an R; value for Fe"(aq). The result is
shown.
solvent front
Fe3+
y
starting line
To make the spot containing Fe*(aq) more visible, the paper is sprayed with aqueous sodium
hydroxide so that a precipitate of iron(II) hydroxide forms.
Under the conditions of the experiment, the R; of Fe3 (aq) is given by .1.. and the colour of
the precipitate is . .
Which row correctly completes gaps 1 and 2?
gaр 1
gap 2
A
red-brown
y
green
y
y
red-brown
y
D
green
> x|


Methods of Purification and Analysis | 2016 - O/N - 5070/11 | Q3