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5.1 Monitoring chemical reactions

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Question 8
F

Which reaction has an atom economy of 100%?

[1]
A

CaCO3→CaO+CO2\mathrm{CaCO_{3} \rightarrow CaO + CO_{2}}CaCO3​→CaO+CO2​

B

Zn+2HCl→ZnCl2+H2\mathrm{Zn + 2HCl \rightarrow ZnCl_{2} + H_{2}}Zn+2HCl→ZnCl2​+H2​

C

C6H12O6→2C2H5OH+2CO2\mathrm{C_{6}H_{12}O_{6} \rightarrow 2C_{2}H_{5}OH + 2CO_{2}}C6​H12​O6​→2C2​H5​OH+2CO2​

D

C2H4+H2O→C2H5OH\mathrm{C_{2}H_{4} + H_{2}O \rightarrow C_{2}H_{5}OH}C2​H4​+H2​O→C2​H5​OH

Markscheme

5.1 Monitoring chemical reactions Questions

  1. GCSE
  2. /Chemistry
  3. /5.1 Monitoring chemical reactions

57 exam-style questions on OCR GCSE Chemistry 5.1 Monitoring chemical reactions, covering 5.1.1 The technique of titration, 5.1.2 Theoretical mass, percentage yield and atom economy, 5.1.3 Concentration of a solution in mol/dm3, 5.1.4 Concentration calculations and titration results, 5.1.5 Molar gas volume and volumes of gases in reactions, and 5.1.6 Choosing a reaction pathway. Each one has a worked solution and a mark scheme showing where the marks go.

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