Skip to content

Course home

Question bank·3.3 Yield and atom economy of chemical reactions
Sign up

3.3 Yield and atom economy of chemical reactions

EasyMediumHard
1234567891011121314151617181920212223242526272829303132333435
Question 4

A factory makes zinc iodide by reacting zinc with excess iodine.

Zn+I2→ZnI2\mathrm{Zn + I_2 \rightarrow ZnI_2}Zn+I2​→ZnI2​

Relative atomic mass (ArA_rAr​): Zn\mathrm{Zn}Zn = 65

Relative formula mass (MrM_rMr​): ZnI2\mathrm{ZnI_2}ZnI2​ = 319

The factory must collect 48.0 kg of zinc iodide. The percentage yield is 78%.

Zinc is supplied in containers holding 12.0 kg.

Calculate the minimum number of full containers of zinc the factory needs.

[4]
Markscheme

3.3 Yield and atom economy of chemical reactions Questions

  1. GCSE
  2. /Chemistry
  3. /3.3 Yield and atom economy of chemical reactions

104 exam-style questions on AQA GCSE Chemistry 3.3 Yield and atom economy of chemical reactions, covering 3.3.1a Percentage yield, 3.3.1b Theoretical mass of a product, 3.3.2a Atom economy, and 3.3.2b Choosing a reaction pathway. Each one has a worked solution and a mark scheme showing where the marks go.

More questions