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Quantitative analysis

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Question 5

Ethyl ethanoate, CH3COOCH2CH3\text{CH}_3\text{COOCH}_2\text{CH}_3CH3​COOCH2​CH3​, can be produced by two different chemical routes.

  • Method 1: Direct addition of ethanoic acid to ethene
CH3COOH+C2H4→CH3COOCH2CH3 \text{CH}_3\text{COOH} + \text{C}_2\text{H}_4 \rightarrow \text{CH}_3\text{COOCH}_2\text{CH}_3 CH3​COOH+C2​H4​→CH3​COOCH2​CH3​ atom economy=100% \text{atom economy} = 100\% atom economy=100%
  • Method 2: Esterification of ethanoic acid and ethanol
CH3COOH+CH3CH2OH→CH3COOCH2CH3+H2O \text{CH}_3\text{COOH} + \text{CH}_3\text{CH}_2\text{OH} \rightarrow \text{CH}_3\text{COOCH}_2\text{CH}_3 + \text{H}_2\text{O} CH3​COOH+CH3​CH2​OH→CH3​COOCH2​CH3​+H2​O atom economy=83.0% \text{atom economy} = 83.0\% atom economy=83.0%

State why Method 1 has an atom economy of 100%.

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Quantitative analysis Questions

  1. GCSE
  2. /Chemistry
  3. /Quantitative analysis

Practise Edexcel GCSE Chemistry Quantitative analysis with exam-style questions for Foundation and Higher tier. 119 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.

Question bank