What is the concentration of an AlCl₃ solution if 150.mL of the solution contains 250.mg of Cl^- ion? A)1.57 × 10^-2 M B)3.75 × 10^-2 M C)4.70 × 10^-2 M D)1.41 × 10^-1 M

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Quizplus · Accepted Answer

To find the concentration in moles per liter (M), first convert the mass of Cl^- ion to moles using its molar mass (35.45 g/mol). $250 \, \text{mg} = 0.250 \, \text{g}$, so moles of Cl^- = $0.250 \, \text{g} / 35.45 \, \text{g/mol} = 0.00705 \, \text{mol}$. Then, divide by the volume in liters (0.150 L) to find the concentration: $0.00705 \, \text{mol} / 0.150 \, \text{L} = 0.047 \, \text{M} = 4.7 \times 10^{-2} \, \text{M}$.

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What Is the Concentration of an AlCl₃ Solution If 150