An investigation was conducted to compare the reactivity of four metals: W, X, Y, and Z.
Equal-sized pieces of each metal were added to excess dilute hydrochloric acid at room temperature and observed for three minutes.
Table 1 shows the observations noted during the reactions for metals W, Y, and Z.
Table 1
| Metal | Observations with dilute hydrochloric acid |
|---|---|
| W | Rapid effervescence of gas. The metal completely disappears within one minute. |
| Y | Only a few bubbles of gas form very slowly. The metal appears almost completely unchanged after three minutes. |
| Z | No bubbles are observed. The metal remains completely unchanged after three minutes. |
Table 2 shows the determined order of reactivity for these four metals.
Table 2
| W | X | Y | Z |
|---|---|---|---|
| Most reactive | Least reactive |
Use the information in Table 1 and Table 2 to suggest the observations that would be made for metal X after three minutes.
110 exam-style questions on Edexcel GCSE Chemistry 5.1 Obtaining and using metals, covering 5.1.1 The reactivity series of metals, 5.1.2 Displacement reactions as redox reactions, 5.1.3 Extracting metals from ores by reduction, 5.1.4 Biological methods of metal extraction, 5.1.5 Resistance to oxidation and recycling metals, and 5.1.6 Life cycle assessment. Each one has a worked solution and a mark scheme showing where the marks go.