A cell is made from a zinc strip and a copper strip in copper sulfate solution. It gives 1.1 V for 6 hours, then the voltage falls to zero. At the end, the zinc strip has been used up but the solution is still blue.
Which change would make the cell give a voltage for longer without changing the voltage?
replace the zinc with an equal mass of magnesium
use a larger volume of copper sulfate solution
use a copper strip of greater mass
use a zinc strip of greater mass
42 exam-style questions on Edexcel GCSE Chemistry 6.4 Chemical cells and fuel cells, covering 6.4.1 Chemical cells and fuel cells. Each one has a worked solution and a mark scheme showing where the marks go.