Expert Chemistry Tutoring

MS1 (1 mark)

- The order of metals in decreasing order of reactivity.

MS2 (2 marks)

- Potassium has a lower ionization energy (1)

- Potassium loses electrons more easily (1)

MS3 (3 marks)

- Magnesium is more reactive than iron (1)

- Magnesium displaces iron from iron(II) sulfate (1)

MS4 (2 marks)

- As anodes in batteries (1)

- As reducing agents (1)

MS5 (4 marks)

- Moles of ZnO = 6.50 / 81.4 = 0.080 mol (1)

- Moles of Zn = 0.080 mol (1)

- Mass of Zn = 0.080 mol × 65.4 = 5.23 g (2)

MS6 (2 marks)

- Decreasing reactivity means decreasing tendency to lose electrons (1)

- Decreasing ease of oxidation (1)

MS7 (3 marks)

- Metal salt and hydrogen gas (1)

MS8 (4 marks)

- Set up a reaction between the metal and a solution of a known more reactive metal salt (1)

- Observe the reaction (1)

- If a reaction occurs, the metal is more reactive than the metal in the salt (1)

- Repeat the process with different metals to determine the order of reactivity (1)

MS9 (2 marks)

- Metal will react easily with oxygen in the air (1)

- Form an oxide layer that prevents electrical conduction (1)

MS10 (3 marks)

- Iron reacts rapidly, producing hydrogen gas (1)

- Copper does not react with dilute hydrochloric acid (1)

- Iron is more reactive than copper (1)