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6.2 Quantitative analysis

6.2 Quantitative analysis

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Question 49

Calculate the atom economy for the production of magnesium oxide (MgO{\text{MgO}}MgO) in the following thermal decomposition reaction:

MgCO3→MgO+CO2 \text{MgCO}_3 \rightarrow \text{MgO} + \text{CO}_2 MgCO3​→MgO+CO2​

You must show your working.

(Relative atomic masses, ArA_rAr​: C=12\text{C} = 12C=12, O=16\text{O} = 16O=16, Mg=24\text{Mg} = 24Mg=24; Relative formula mass, MrM_rMr​: MgO=40\text{MgO} = 40MgO=40)

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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.

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