Skip to content

Course home

1.1 Formulae, equations and hazards

1.1 Formulae, equations and hazards

EasyMediumHard
1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950
Question 5
F

Farmers use fertilisers such as ammonium sulfate. Ammonium sulfate is made from ammonia. Ammonia is made by reacting nitrogen with hydrogen in a reversible reaction.

a.

Write the word equation for making ammonia.

[1]
b.

Balance the equation: N2(g)+H2(g)⇌NH3(g)\mathrm{N_{2}(g)} + \mathrm{H_{2}(g)} \rightleftharpoons \mathrm{NH_{3}(g)}N2​(g)+H2​(g)⇌NH3​(g)

[1]
c.i.

Ammonium sulfate contains ammonium ions, NH4+\mathrm{NH_{4}^{+}}NH4+​, and sulfate ions, SO42−\mathrm{SO_{4}^{2-}}SO42−​.

Give the formula of ammonium sulfate.

[1]
c.ii.

Give the total number of atoms in the formula of ammonium sulfate.

[1]
d.

Balance the equation for making ammonium sulfate: NH3+H2SO4→(NH4)2SO4\mathrm{NH_{3}} + \mathrm{H_{2}SO_{4}} \rightarrow \mathrm{(NH_{4})_{2}SO_{4}}NH3​+H2​SO4​→(NH4​)2​SO4​

[1]
e.

Calculate the percentage by mass of nitrogen in ammonium sulfate. Relative atomic masses: H = 1, N = 14, O = 16, S = 32. Give your answer to three significant figures.

[3]
Markscheme

1.1 Formulae, equations and hazards Questions

  1. GCSE
  2. /Chemistry
  3. /1.1 Formulae, equations and hazards

230 exam-style questions on Edexcel GCSE Chemistry 1.1 Formulae, equations and hazards, covering 1.1.1 Formulae, word and balanced equations, 1.1.2 Balanced ionic equations, and 1.1.3 Hazard symbols and risk in practical work. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank