Two different food dye samples, W and Z, were compared using thin layer chromatography as shown below - VCE - SSCE Chemistry - Question 17 - 2011 - Paper 1
Question 17
Two different food dye samples, W and Z, were compared using thin layer chromatography as shown below.
**Figure:**
[Insert Figure Here]
**Options:**
A. Z is mor... show full transcript
Worked Solution & Example Answer:Two different food dye samples, W and Z, were compared using thin layer chromatography as shown below - VCE - SSCE Chemistry - Question 17 - 2011 - Paper 1
Step 1
Determine the position of the samples
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Answer
Examine the chromatogram and note the positions of samples W and Z in relation to the solvent front.
Step 2
Analyze the separation characteristics
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Answer
Identify which dye sample has travelled further up the plate. The dye that travels farther typically indicates a lower degree of adsorption to the stationary phase.
Step 3
Evaluate the options based on observations
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Answer
If sample Z is positioned higher than sample W, it suggests that Z is less adsorbed, leading to the conclusion that Z has a higher Rf value compared to W.
Step 4
Select the correct answer
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Answer
Based on the observations, the correct choice is A: 'Z is more strongly adsorbed than W and has a lower Rf value.'
