Multiple Choice
Which expression correctly defines the molality of a solution?
1
views
14. Solutions
Molality
Back14. Solutions
Molality
- Multiple ChoiceWhich of the following best describes how molality differs from molarity?
- Multiple ChoiceCommercial grade hydrochloric acid is typically sold as an aqueous solution that is 39.0% HCl by mass and has a density at 20 °C of 1.20 g/mL. Determine the molality of the HCl solution.
- Multiple ChoiceThe molarity of an aqueous solution is 1.58 M with a density of 0.976 g/mL. The molar mass of the solute is 195 g/mol. What is the molality (m) of the solution?
- Multiple ChoiceWhat is the molality of a solution that contains 75.3 g of KCl dissolved in 95.0 g of water? (Molar mass of KCl = 74.55 g/mol)
- Multiple ChoiceIf 0.98 g of an unknown was dissolved in 10.30 g of solvent and the resulting solution has a molality of 0.45 m, what is the molar mass of the unknown?
- Open Question
What mass (in g) of nh3 must be dissolved in 475 g of methanol to make a 0.250 m solution?
- Multiple ChoiceA solution of LiCl in water has a mole fraction of LiCl, X(LiCl) = 0.0800. What is the molality of the solution?
- Multiple ChoiceWhat is the molality of a 10.5% by mass glucose (C₆H₁₂O₆) solution, given that the density of the solution is 1.03 g/mL?
- Open Question
What is the molar concentration of Na+ ions in 0.0250 m solutions of the following sodium salts in water?
1views - Open Question
If we dissolve 36 grams of salt in 148 grams of water, what is the mass of the resulting solution?
- Multiple Choice
The density of a 15.7 M methanol (CH3OH) solution is 0.858 g/mL. If H2O is the solvent, what is the molality of the solution?
6views - Multiple Choice
What is the ionic molality of sodium ions in a solution of 25.7 g NaNO3 dissolved in enough water to make a 150.0 mL of solution? Density of the solution is 1.02 g/mL.
1views - Multiple ChoiceWhat is the molarity of a solution prepared by dissolving 5.00 g of NaCl in 500.0 mL of water?2views
- Multiple ChoiceAn aqueous solution contains 36% HCl by mass. If the density of the solution is 1.18 g/mL, what is the molality of HCl in the solution?