Phytoextraction is a biological method used to extract metals from soils contaminated with metal compounds.
Plants are grown in the contaminated soil, absorbing metal ions through their roots. The plants are then harvested, dried, and burned to produce an ash containing those metal compounds.
In an investigation, plants were grown on land contaminated with copper compounds.
A 2.0 kg sample of the dry ash obtained from these plants was found to contain 136.0 g of copper compounds.
Calculate the percentage by mass of copper compounds in this ash.
Practise Edexcel GCSE Chemistry Obtaining and using metals with exam-style questions for Foundation and Higher tier. 100 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.