A technician compares the reactions of sodium and an unknown metal, X, with water. Metal X is in Group 1 below sodium.
Equal masses of pieces with similar surface areas are added to separate samples of water. The samples have the same volume and starting temperature.
| Metal | Time taken to collect the first 10 cm310\,\mathrm{cm^{3}}10cm3 of gas |
|---|---|
| sodium | 38 s |
| X | 9 s |
Compare the reactivity of metal X with the reactivity of sodium. Use the results in the table.
Explain your conclusion in part (a), using ideas about atomic structure.
Write the formula of the hydroxide formed when metal X reacts with water and write the balanced symbol equation for the reaction.
113 exam-style questions on OCR GCSE Chemistry 4.1 Predicting chemical reactions, covering 4.1.1 Properties and trends in Groups 1, 7 and 0, 4.1.2 Properties of the transition metals, 4.1.3 Reactivity predicted from position in the Periodic Table, and 4.1.4 Reactivity of metals and the reactivity series. Each one has a worked solution and a mark scheme showing where the marks go.