Chemistry · Oct / Nov 2020 · Paper 61 · Question 1
0620
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The question as text
The table gives the boiling points of four alcohols. alcohol boiling point / °C butanol 117 ethanol 79 pentanol 138 propanol 97 The apparatus shown can be used to obtain propanol from a mixture containing butanol, ethanol, pentanol and propanol. A B mixture of alcohols electric heater alcohol collected water
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1(a)[2]
A thermometer
B (Liebig) condenser
1(b)[2]
fractional
distillation
1(c)[1]
alcohols are flammable
1(d)[2]
heat to remove the ethanol
collect propanol at 97 °C
1(e)[1]
water boils at 100 °C / water bath will not go above 100 °C
OR
butanol boils at over 100 °C / butanol boils at 117 °C
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