Lactated Ringer's solution can be prepared by dissolving 0.6000 g sodium chloride (NaCl, 58.44 g/mol), 0.310 g sodium lactate (NaC₃H₅O₃ 112.06 g/mol), 30.00 mg potassium chloride (KCl, 74.55 g/mol), and 20.00 mg calcium chloride dihydrate (CaCl₂.2H₂O, 147.0 g/mol) in water to give a final volume of 100.0 mL.What is the molar concentration of chloride?

Question

Quizplus · Accepted Answer

The molar concentration of chloride is calculated by finding the moles of chloride ions contributed by each compound and dividing by the total volume in liters. NaCl contributes 0.6000 g / 58.44 g/mol = 0.01027 mol of Cl⁻. KCl contributes 0.03000 g / 74.55 g/mol = 0.000402 mol of Cl⁻. CaCl₂·2H₂O contributes 0.02000 g / 147.0 g/mol = 0.000136 mol of CaCl₂, which gives 2 * 0.000136 mol = 0.000272 mol of Cl⁻. Total moles of Cl⁻ = 0.01027 + 0.000402 + 0.000272 = 0.010944 mol. The concentration is 0.010944 mol / 0.1 L = 0.1094 M.

Lactated Ringer's Solution Can Be Prepared by Dissolving 0