A chemistry student is given a 10 mL sample of a solution containing chloride ions and sulfate ions, and is asked to determine the mass of each ion present in the sample. The student knows that the total mass of the solution is 12.25 g, and that the density of the solution is 1.225 g/mL. The student also knows that the mass percent of chloride ions in the solution is 5%, and the mass percent of sulfate ions is 10%. Using mass balance calculations, what is the mass of chloride ions and sulfate ions present in the sample?

Question

A chemistry student is given a 10 mL sample of a solution containing chloride ions and sulfate ions, and is asked to determine the mass of each ion present in the sample. The student knows that the total mass of the solution is 12.25 g, and that the density of the solution is 1.225 g/mL. The student also knows that the mass percent of chloride ions in the solution is 5%, and the mass percent

Answer 1

To determine the mass of chloride ions and sulfate ions present in the sample, we can follow these steps:1. Calculate the mass of the solution.2. Calculate the mass of chloride ions and sulfate ions using mass percent.Step 1: Calculate the mass of the solutionThe student is given a 10 mL sample of the solution, and the density of the solution is 1.225 g/mL. We can use the formula:mass = volume  densitymass = 10 mL  1.225 g/mL = 12.25 gThe mass of the solution is 12.25 g.Step 2: Calculate the mass of chloride ions and sulfate ions using mass percentThe mass percent of chloride ions in the solution is 5%, and the mass percent of sulfate ions is 10%. We can use the formula:mass of ion =  mass percent of ion / 100   mass of solutionFor chloride ions:mass of chloride ions =  5% / 100   12.25 g = 0.05  12.25 g = 0.6125 gFor sulfate ions:mass of sulfate ions =  10% / 100   12.25 g = 0.10  12.25 g = 1.225 gSo, the mass of chloride ions present in the sample is 0.6125 g, and the mass of sulfate ions present in the sample is 1.225 g.