4.4 Chemical changes

Practice questions on Chemical changes

• Magnesium reacts with dilute hydrochloric acid to form magnesium chloride and hydrogen gas… (4 marks, Describe and Explain)
• A student adds a piece of zinc to iron sulfate solution. No visible reaction occurs when z… (4 marks, Explain)
• Iron is below carbon in the reactivity series but above copper. Explain why iron can be ex… (4 marks, Explain)
• Zinc, copper and magnesium are all metals. A student places a piece of magnesium into copp… (4 marks, Explain)
• A student investigates how four metals react with dilute hydrochloric acid. Potassium reac… (4 marks, Explain)
• A student wants to extract three metals — copper, aluminium, and silver — from their metal… (4 marks, Explain)
• Explain what happens during the electrolysis of molten lead bromide, including what is pro… (4 marks, Explain)
• During the electrolysis of copper chloride solution, describe what happens at each electro… (4 marks, Describe)
• During the electrolysis of copper sulfate solution, copper is deposited at the negative el… (4 marks, Explain)
• Explain why aluminium cannot be extracted from its ore by reduction with carbon, and state… (4 marks, Explain)
• Explain what happens at each electrode when aqueous sodium chloride solution is electrolys… (4 marks, Explain)
• Sodium, calcium, zinc, iron and copper can all be placed in the reactivity series. Explain… (4 marks, Explain)
• Calcium, zinc and copper are metals. Describe what happens when each of these metals is ad… (4 marks, Describe)
• Iron and calcium are both metals that react with dilute hydrochloric acid. Describe the di… (4 marks, Describe)
• Zinc, iron and copper are metals that can react with dilute sulfuric acid. Describe what h… (4 marks, Describe and Explain)