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Propanol, C₃H₈O, can undergo reactions to form compounds Y and Z shown in Figure 14 - Edexcel - GCSE Chemistry - Question 10 - 2021 - Paper 1
Question 10
Propanol, C₃H₈O, can undergo reactions to form compounds Y and Z shown in Figure 14. (i) What happens to propanol when it forms compound Y? A. propanol undergoes a... show full transcript
Worked Solution & Example Answer:Propanol, C₃H₈O, can undergo reactions to form compounds Y and Z shown in Figure 14 - Edexcel - GCSE Chemistry - Question 10 - 2021 - Paper 1
Step 1
What happens to propanol when it forms compound Y?
Answer
When propanol forms compound Y, it undergoes dehydration, which means water is removed from the molecule during the reaction process. This results in the formation of alkenes from alcohols, indicating that compound Y is likely an alkene.
Step 2
Explain how bromine water can be used to distinguish between compound X and compound Y.
Answer
Bromine water can be used to distinguish between compound X and compound Y based on their reactivity. Compound Y, being an alkene formed from propanol, will undergo an addition reaction with bromine, resulting in a color change from brown to colorless. In contrast, compound X (if it is still an alcohol) will not react with bromine water and will retain its brown color. Thus, the decolorization of bromine water indicates the presence of the alkene (compound Y).