(a)[2]
Gas bubbles are seen at the anode. Name the gas released at the anode. Give a test and observation that identify the gas.
(b(i))[1]
What should the student do to the cathode before it is weighed?
(b(ii))[1]
The student weighs the cathode. Which vital measurement is omitted from the method?
(c(i))[4]
Plot the tabled results onto the grid. Use the points to draw two straight lines of best fit that intersect.
(c(ii))[1]
Circle the anomalous point.
(d(i))[1]
Use your graph to find the time required for $0.80\,\text{g}$ of copper to be deposited.
(d(ii))[1]
Use your graph to find how long it takes for all the copper to be deposited.
(e)[2]
What is the colour of the electrolyte: • at the beginning of the experiment • when all the copper has been deposited at the cathode?