CAIE IGCSE Chemistry Metal Reactivity from Displacement

Practise using displacement reactions and simple cells to rank metals by their tendency to form positive ions, supported by equations and observations.

Exam points

predict that a more reactive metal displaces a less reactive metal from its aqueous ions
write the ionic equation with the more reactive metal forming positive ions
use solution colour, deposited metal, electron flow or voltage to deduce relative reactivity

[Maximum number: 2]

Some elements are shown in the order they appear in the reactivity series. The most reactive element is at the top.
> sodium calcium magnesium aluminium zinc iron hydrogen copper

(a)

When zinc granules are added to aqueous copper(II) sulfate, a reaction occurs. During the reaction, a red-pink solid is formed and the solution becomes colourless.

[ 2 ]

(i)

Name the red-pink solid.

[ 1 ]

(ii)

Name the colourless solution.

[ 1 ]

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9.4.4—Relative reactivities of metals in question 1

Question (a)

Question (i)

Question (ii)