The concentration of Mg in seawater is 0.054 M. How many grams of Mg can be extracted from 10.0 kg of seawater if the recovery rate is 20.0%?

Question

Quizplus · Accepted Answer

First, calculate the moles of Mg in 10.0 kg of seawater: 10,000 g seawater * 0.054 mol/L * (1 L/1000 g) = 0.54 mol Mg. The molar mass of Mg is 24.305 g/mol, so 0.54 mol * 24.305 g/mol = 13.1157 g Mg. With a 20% recovery rate, 13.1157 g * 0.20 = 2.62314 g, which rounds to 2.60 g.

The Concentration of Mg in Seawater Is 0