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?

6.178 g.

Explanation:

KCl → K⁺ + Cl⁻.

∴ [KCl] = [K⁺] = [Cl⁻] = 0.193 M.

Molarity is defined as the no. of moles of the solute per 1.0 L of the solution.

∵ M = [(mass/molar mass)KCl][(1000)/(V of the solution)].

∴ mass of KCl = (M)(molar mass of KCl)(V of the solution)/1000 = (0.193 M)(74.55 g/mol)(430.0 mL)/1000 = 6.178 g.

since electrons are negative the answer is neagtaive