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One way to extract metals from land contaminated with metal compounds is phytoextraction - Edexcel - GCSE Chemistry - Question 5 - 2019 - Paper 1
Question 5
One way to extract metals from land contaminated with metal compounds is phytoextraction. When plants grow they absorb metal ions through their roots. The plants are... show full transcript
Worked Solution & Example Answer:One way to extract metals from land contaminated with metal compounds is phytoextraction - Edexcel - GCSE Chemistry - Question 5 - 2019 - Paper 1
Step 1
Calculate the percentage by mass of nickel compounds in the ash.
Answer
To find the percentage by mass of nickel compounds in the ash, we can use the following formula:
Substituting the known values:
- Mass of nickel compounds = 142.0 g
- Mass of ash = 1 kg = 1000 g
Therefore:
Thus, the percentage by mass of nickel compounds in the ash is 14.2%.
Step 2
State an advantage of extracting nickel by phytoextraction rather than from its ore.
Answer
One advantage of extracting nickel by phytoextraction is that it minimizes environmental impact. Phytoextraction does not require large-scale mining operations, which can lead to deforestation and habitat destruction. Additionally, it can be less energy-intensive than traditional ore extraction methods, ultimately reducing carbon emissions associated with metal extraction.