What is the molarity of sodium chloride in solution that is 13.0% by mass sodium chloride and that has a density of 1.10 g/mL? A)143 B)2.45 C)2.56 D)2.23 E)1.43 × 10^-2

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Quizplus · Accepted Answer

To find the molarity of the sodium chloride solution, we first need to understand what each term means. Molarity (M) is defined as the number of moles of solute (in this case, sodium chloride, NaCl) per liter of solution. The given information is that the solution is 13.0% by mass sodium chloride and has a density of 1.10 g/mL.1. Calculate the mass of NaCl in 100 g of solution (since 13.0% by mass means 13.0 g of NaCl in 100 g of solution).2. Convert the mass of NaCl to moles using its molar mass (approximately 58.44 g/mol for NaCl).3. Calculate the volume of the solution in liters, using its density (1.10 g/mL) and the total mass of the solution. Since we're using 100 g of solution and the density is 1.10 g/mL, the volume is 100 g / (1.10 g/mL) = 90.91 mL = 0.09091 L.4. Finally, calculate the molarity by dividing the moles of NaCl by the volume of the solution in liters.Step-by-step calculation:1. Mass of NaCl = 13.0 g2. Moles of NaCl = 13.0 g / 58.44 g/mol = 0.222 moles3. Volume of solution = 100 g / (1.10 g/mL) = 90.91 mL = 0.09091 L4. Molarity (M) = 0.222 moles / 0.09091 L = 2.44 MThe correct answer is B) 2.45, which is the closest option to our calculated value.

What Is the Molarity of Sodium Chloride in Solution That