Reactivity of metals

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Question 5
Easy

A student investigated the displacement reactions between different metals and iron(II) sulfate solution.

The student measured 50 cm350\text{ cm}^350 cm3 of iron(II) sulfate solution into a polystyrene cup, recorded the starting temperature, added a metal, and measured the maximum temperature change.

Table 1 shows the student's results:

MetalTemperature change (∘C^{\circ}\text{C}∘C)
Magnesium+25+25+25
Zinc+12+12+12
Copper000
a.

Identify the independent variable and the dependent variable in this investigation.

[2]
b.

Write the three metals in order of decreasing reactivity (from most reactive to least reactive).

[2]
c.

The reaction profile for the reaction between magnesium and iron(II) sulfate solution is shown below.

An energy level diagram showing progress of reaction on the x-axis and energy on the y-axis. A horizontal line on the left represents the reactants and is labeled X. The curve rises from the reactants to a peak, and then decreases to a horizontal line on the right representing the products, labeled Y. A vertical double-headed arrow pointing from the reactants line up to the peak is labeled Z. A vertical double-headed arrow pointing from the reactants line down to the products line is labeled W.

Which letter represents the activation energy, and which letter represents the products?

[2]

Reactivity of metals Questions

  1. GCSE
  2. /Chemistry
  3. /Reactivity of metals