Ch.12 - SolutionsWorksheetSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds

Solution: Calculate the molality of total ions in an aqueous solution prepared by dissolving 0.400 moles of magnesium chloride in 850.0 g of water.A. 0.47 x 10-4 mB. 1.41 x 10-4 mC. 1.41 mD. 0.47 mE. 0.941 m

Solution: Calculate the molality of total ions in an aqueous solution prepared by dissolving 0.400 moles of magnesium chloride in 850.0 g of water.A. 0.47 x 10-4 mB. 1.41 x 10-4 mC. 1.41 mD. 0.47 mE. 0.941 m

Problem

Calculate the molality of total ions in an aqueous solution prepared by dissolving 0.400 moles of magnesium chloride in 850.0 g of water.

A. 0.47 x 10-4 m

B. 1.41 x 10-4 m

C. 1.41 m

D. 0.47 m

E. 0.941 m

Solution

We’re being asked to calculate for the molality of total ions in an aqueous solution prepared by dissolving 0.400 moles of magnesium chloride in 850.0 g of water. 

When calculating for molality, we use the following equation:

The moles of MgCl2 is given but we were asked to determine the molality of total ions

We will calculate the molality of the solution using the following steps:

Step 1. Determine the ions present in the solution.
Step 2. Calculate the moles of the ions present in the solution.
Step 3. Calculate the mass of the solvent (in kg).
Step 4. Calculate the molality of total ions.


Step 1. Determine the ions present in the solution.

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