1.1. A student investigated the temperature change in displacement reactions between metals and iron sulfate solution.

The student’s results are shown in Table 1.

Table 1

Explain what type of graph should be plotted from the student's results.

1.2. Using the student's results, explain whether it is possible to rank the metals from most to least reactive or not.

1.3. You have been asked to make one adaptation to the experiment so that you can find the position of an unknown metal in the reactivity series.

Describe the method, including your adaptation, to determine the position of an unknown metal in the reactivity series.

Your adapted method should give valid results.