hellokittykjbovw85r hellokittykjbovw85r
  • 10-04-2019
  • Chemistry
contestada

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?​

Respuesta :

superman1987
superman1987 superman1987
  • 20-04-2019

Answer:

6.178 g.

Explanation:

  • KCl is ionized in the solution as:

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.

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