Question Constellation Sign up for free AQA · GCSE · Chemistry · Higher
Recovering compounds after phytomining
Phytomining uses plants to absorb metal compounds from low-grade ores.
Describe how the metal compounds are obtained from the plants.
Write your answer first. You can study the marking guidance whenever you need it.
Study the marking See what earns credit and compare it with a full-mark answer.
Marking points
- 1 States that the plants are harvested.
- 2 States that the plants are burned.
- 3 States that the resulting ash contains the metal compounds.
Full-mark answer
The plants are harvested and burned. This produces ash containing the metal compounds.
Why this answer loses marks
Extract the compounds directly from the living plants.
The method requires the plants to be harvested and burned, leaving the compounds in the ash.