### Determining the Molarity of a Manganese(II) Chloride SolutionA student weighs out a 3.48 g sample of manganese(II) chloride, transfers it to a 125 mL volumetric flask, adds enough water to dissolve it, and then adds water to the 125 mL tic mark.**Problem:**What is the molarity of MnCl₂ in the resulting solution?**Solution:**To find the molarity, we need to follow these steps:1. **Calculate the molar mass of MnCl₂:** - Manganese (Mn): Atomic mass = 54.94 g/mol - Chlorine (Cl): Atomic mass = 35.45 g/mol (since there are two Cl atoms, multiply by 2) Molar mass of MnCl₂ = 54.94 g/mol + (2 × 35.45 g/mol) = 54.94 g/mol + 70.90 g/mol = 125.84 g/mol2. **Convert grams of MnCl₂ to moles:** \[\text{moles of MnCl₂} = \frac{\text{mass (g)}}{\text{molar mass (g/mol)}} = \frac{3.48 \, \text{g}}{125.84 \, \text{g/mol}} = 0.02765 \, \text{mol}\]3. **Convert the volume from mL to L:** \[125 \, \text{mL} = 0.125 \, \text{L}\]4. **Calculate the molarity (M):** \[\text{Molarity (M)} = \frac{\text{moles of solute}}{\text{liters of solution}} = \frac{0.02765 \, \text{mol}}{0.125 \, \text{L}} = 0.2212 \, \text{M}\]Therefore, the molarity of MnCl₂ in the resulting solution is **0.2212 M**.**Box for Answer:**\[ \boxed{0.2212 \, \text{M}} \]This question can be useful for students who want to understand the process of calculating the molarity of a solution from a given mass of solute and the final volume of solution.

Molarity of any solution is defined as the moles of solute present per litre of the solution Hence…

A student weighs out a 3.48 g sample of manganese(II) chloride, transfers it to a 125 mL volumetric flask, adds enough water to dissolve it and then adds water to the 125 mL tic mark. What is the molarity of MnCl, in the resulting solution?

A student weighs out a 3.48 g sample of manganese(II) chloride, transfers it to a 125 mL volumetric flask, adds enough water to dissolve it and then adds water to the 125 mL tic mark. What is the molarity of MnCl, in the resulting solution?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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