What mass (g)of potassium chloride is contained in 430.0 mL of a potassium chloride solution that has a chloride ion concentration of 0.193 M?
A)0.0643
B)0.0830
C)12.37
D)0.386
E)6.19

Question

Quizplus · Accepted Answer

To find the mass of KCl, first calculate the moles of Cl- ions using the concentration (0.193 M) and volume (0.430 L). Moles of Cl- = 0.193 mol/L * 0.430 L = 0.083 mol. Since KCl dissociates into K+ and Cl-, moles of KCl = moles of Cl-. The molar mass of KCl is approximately 74.55 g/mol. Mass of KCl = 0.083 mol * 74.55 g/mol = 6.19 g.

What Mass (G)of Potassium Chloride Is Contained in 430