GCSE Edexcel Chemistry Combined Science Extracting metals using carbon: One way to extract metals from l

Question

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 harvested, dried and burned forming an ash.
The ash contains metal compounds.

Plants were grown in a piece of ground contaminated with nickel compounds.

(i) 1 kg of the ash from these plants contained 142.0 g of nickel compounds.
Calculate the percentage by mass of nickel compounds in the ash.

(ii) Nickel is extracted from nickel compounds.
State an advantage of extracting nickel by phytoextraction rather than from its ore.

(b) Some nickel ores contain nickel sulfide.

(i) In the first stage of extracting nickel from nickel sulfide, the nickel sulfide, NiS, is heated in air to form nickel oxide, NiO, and sulfur dioxide.
Write the balanced equation for this reaction.

One way to extract metals from land contaminated with metal compounds is phytoextraction - Edexcel - GCSE Chemistry Combined Science - Question 3 - 2019 - Paper 1

Worked Solution & Example Answer:One way to extract metals from land contaminated with metal compounds is phytoextraction - Edexcel - GCSE Chemistry Combined Science - Question 3 - 2019 - Paper 1

Calculate the percentage by mass of nickel compounds in the ash.

State an advantage of extracting nickel by phytoextraction rather than from its ore.

Write the balanced equation for this reaction.

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