In gas chromatography, compounds may be separated based on their molecular weight - HSC - SSCE Chemistry - Question 11 - 2004 - Paper 1
Question 11
In gas chromatography, compounds may be separated based on their molecular weight. The smaller the molecular weight the more quickly the compound is detected. A gas ... show full transcript
Worked Solution & Example Answer:In gas chromatography, compounds may be separated based on their molecular weight - HSC - SSCE Chemistry - Question 11 - 2004 - Paper 1
Step 1
Identify Molecular Weights
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Answer
Identify the molecular weights of the given compounds:
1-hexanol: approximately 102 g/mol
1-octanol: approximately 130 g/mol
1-heptanol: approximately 116 g/mol
1-pentanol: approximately 88 g/mol
Step 2
Analyze Chromatogram
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Answer
Examine the chromatogram. Peak X occurs first, indicating it is the compound with the lowest molecular weight.
Step 3
Determine Substance Corresponding to Peak X
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Answer
Since 1-pentanol has the lowest molecular weight among the substances in the analysis, peak X corresponds to 1-pentanol. Thus, the answer is (D) 1-pentanol.
