SC-703
Chromatography
Lower Sec Science · Secondary 1 · Medium · Chromatography
A mixture of blue and yellow food dyes is separated using paper chromatography with water as the solvent. After the run, the student sees two separate spots above the start line. What does this show about the mixture?
- It contains two different dyes and is a mixture.
- It is a pure substance because both spots are coloured.
- The dyes did not dissolve in the solvent at all.
- The start line should have been drawn with ink, not pencil.
Sign in to check your answer and see the hint and the worked explanation. Free on PrepLab High.