A 150 mL solution was obtained from a pond and analyzed for calcium content. To do this, an excess of potassium sulfate was added. The calcium compound that precipitated was measured to be 25.5 milligrams. Determine the grams of the element calcium in one Liter of water.
1. 18.0 milligrams per Liter of pond water
2. 50.0 milligrams per Liter of pond water
3. 37.1 milligrams per Liter of pond water
4. 20.2 milligrams per Liter of pond water
5. 28.8 milligrams per Liter of pond water