Question

Over time, dissolved magnesium concentration in a lake has reached equilibrium. input is from streams draining into the lake; magnesium is removed by precipitation in lake sediments. if wastewater discharge upstream doubles the rate at which magnesium is delivered to the lake,

Answer 1

For the answer to the question above, I think the answer is that "the residence time of the magnesium in the lake will be halved" if magnesium is removed by precipitation in lake sediments. I hope my answer helped you. Have a nice day!