Displacement reactions involving solutions of salts
2 marks · NormalWrite the ionic half-equation for the reduction that takes place when lead metal is formed from lead(II) ions.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
Show answer
Pb^{2+}(aq) + 2e^- \rightarrow Pb(s)
Also accept: \ce{Pb^{2+} (aq) + 2e^- -> Pb (s)}; Pb2+(aq) + 2e- -> Pb(s)
Common mistakes: Incorrect number of electrons; Omitting state symbols
Show mark scheme and worked solution
Marking points
M1 · 1 mark · Correctly places lead(II) ions and electrons on left, lead atom on right.
A1 · 1 mark · Equaton is balanced for charge and atoms, with states.
Worked solution