Skip to content

Course home

Sign up

3.1 Introducing chemical reactions

EasyMediumHard
1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162
Question 14

Sodium reacts with an acid. During the reaction:

  • sodium atoms form sodium ions
  • hydrogen ions from the acid form hydrogen molecules
a.

Write the balanced half equation for each of these changes.

[2]
b.

Write the balanced ionic equation for the overall reaction.

[1]
Markscheme

3.1 Introducing chemical reactions Questions

  1. GCSE
  2. /Chemistry
  3. /3.1 Introducing chemical reactions

134 exam-style questions on OCR GCSE Chemistry 3.1 Introducing chemical reactions, covering 3.1.1 Writing formulae and balanced chemical equations, 3.1.2 Formulae of compounds from ions, and state symbols, 3.1.3 Conservation of mass and observed changes in mass, 3.1.4 Half equations and balanced ionic equations, 3.1.5 The mole and the Avogadro constant, and 3.1.6 Stoichiometry, limiting reactants and reacting masses. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank