An engineer is comparing the reactivity of four metals (chromium, manganese, nickel, and titanium) to assess their suitability for a sacrificial anode system. They measure the temperature rise when each metal is added to a standard solution of copper(II) nitrate.
In the initial trial, the engineer uses a chromium rod, manganese flakes, nickel powder, and a titanium plate.
Describe two improvements that should be made to the metal samples to ensure a fair comparison of the temperature change.
Practise Edexcel GCSE Chemistry Obtaining and using metals with exam-style questions for Foundation and Higher tier. 110 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
