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3. (a) Transition metals and group 1 metals have many properties in common because they are all metals - Edexcel - GCSE Chemistry - Question 3 - 2019 - Paper 1
Question 3
3. (a) Transition metals and group 1 metals have many properties in common because they are all metals. However some properties of transition metals are different f... show full transcript
Worked Solution & Example Answer:3. (a) Transition metals and group 1 metals have many properties in common because they are all metals - Edexcel - GCSE Chemistry - Question 3 - 2019 - Paper 1
Step 1
Step 2
Describe two changes you would see during this reaction.
Answer
During the reaction between magnesium and copper sulfate solution, the following two changes would be observed:
- The color of the solution changes from blue (due to copper sulfate) to colorless as copper is formed.
- Brown copper metal appears as it precipitates out of the solution.
Step 3
Step 4
Describe a simple experiment to compare how much an iron nail rusts in sea water compared to water.
Answer
To compare rusting of iron nails in sea water and water:
- Clean two iron nails to remove any rust.
- Place each nail in separate test tubes containing water and sea water, respectively.
- Leave the test tubes for a specified period, such as one week.
- Observe the nails and record any changes in rusting appearance or mass to compare the results.
Step 5
Calculate the mass of zinc required to coat the surface of the bucket with a layer of zinc of 200 g m².
Answer
To calculate the mass of zinc needed, use the formula:
Mass of zinc = Surface area × Zinc coating thickness
Given:
- Surface area = 0.68 m²
- Zinc coating = 200 g m²
Mass of zinc = 0.68 × 200 = 136 g.