Question

Sam’s household water is contaminated with copper. His family decides to use reverse osmosis to remove the copper. Select the three sentences that support his family’s choice of using reverse osmosis to remove the copper.(1 p0int)
Responses

It uses a membrane filter with small pore size that removes metal ions.
It uses a membrane filter with small pore size that removes metal ions.

It removes chemical contaminants.
It removes chemical contaminants.

It has a low cost and does not require much maintenance.
It has a low cost and does not require much maintenance.

It has a small pore size which limits the flow rate.

Answer 1

Select these three:

- It uses a membrane filter with small pore size that removes metal ions.
- It removes chemical contaminants.
- It has a small pore size which limits the flow rate.

Reason: RO works by forcing water through a very fine membrane that excludes dissolved ions and many chemical contaminants. The small pore size (and resulting lower flow) is a characteristic of the process. The statement about low cost/low maintenance is incorrect.