Skip to content

Course home

6.2 Quantitative analysis

6.2 Quantitative analysis

EasyMediumHard
12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273
Question 59

Zinc can be obtained by heating zinc oxide with carbon.

The balanced equation for the reaction is:

2ZnO+C→2Zn+CO2 2\text{ZnO} + \text{C} \rightarrow 2\text{Zn} + \text{CO}_2 2ZnO+C→2Zn+CO2​

Calculate the atom economy for the production of zinc in this reaction.

Relative atomic masses (ArA_rAr​): C=12\text{C} = 12C=12, O=16\text{O} = 16O=16, Zn=65\text{Zn} = 65Zn=65

Relative formula masses (MrM_rMr​): ZnO=81\text{ZnO} = 81ZnO=81, CO2=44\text{CO}_2 = 44CO2​=44

Give your answer to two significant figures.

[4]
Markscheme

6.2 Quantitative analysis Questions

  1. GCSE
  2. /Chemistry
  3. /6.2 Quantitative analysis

157 exam-style questions on Edexcel GCSE Chemistry 6.2 Quantitative analysis, covering 6.2.1 Concentration in mol dm⁻³ and titration calculations, 6.2.2 Percentage yield and why actual yield falls short, 6.2.3 Atom economy of a reaction, 6.2.4 Choosing a reaction pathway, and 6.2.5 Molar volume of gases and Avogadro's law. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank