Properties of Solutions. SC 132 CHEM 2 Chemistry: The Central Science CM Lamberty. Homework. Chapter 13 14, 16, 18, 20 22a, 24, 28, 30, 32, 34 36, 38, 40, 42, 44, 46, 48, 50, 52, 54 60, 64, 66, 68, 70, 72, 74, 76, 78, 86, 89, 91, 98, 112. The Solution Process.
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
SC 132 CHEM 2
Chemistry: The Central Science
LIKE DISSOLVES LIKE
Substances with similar types of intermolecular forces dissolve in each other.
When a solute dissolves in a solvent, solute-solute interactions and solvent-solvent interactions are being replaced with solute-solvent interactions. The forces must be comparable in strength in order to have a solution occur.
Solvation: Interactions between solute and solvent molecules.
Hydration: when solvent is water
DHsoln = DHsolute + DHsolvent + DHmix
in ionic salt-aqueous solutions:
DHsoln = DHlattice + DHhydration of ions
DHsoln < 0 means that solution formation is favored!
Only relevant to Sgas
Sgas = kHPgas
volume (L) of solution
amount (mol) of solute
mass (kg) of solvent
mass of solute
Parts by mass
mass of solution
volume of solute
Parts by volume
volume of solution
amount (mol) of component
Total moles of all componentWays of Experessing Concentration
Hydrogen peroxide is a powerful oxidizing agent used in concentrated solution in rocket fuels and in dilute solution a a hair bleach. An aqueous solution H2O2 is 30.0% by mass and has a density of 1.11 g/mL. Calculate its
(b) Mole fraction of H2O2
A sample of commercial concentrated hydrochloric acid is 11.8M and has a density of 1.190g/mL. Calculate its
(b) Mole fraction of H2O2
(c) Mass %
Calculate the vapor pressure lowering, DP, of a solution of 2.00g of aspirin (MM-180.15 g/mol) in 50g of methanol (CH3OH) at 21.2°C. Pure methanol has a vapor pressure of 101 torr at this temperature.
You add 1.00 kg of ethylene glycol (C2H6O2) antifreeze to your car radiator which contains 4450g H2O. What are the boiling points and freezing points of the solution? (kf = 1.86°C/m and kb = 0.512°C/m for water)
How many grams of NaCl must be added to a 5.00 gallon bucket filled with water (d = 1.00g/mL) to prevent the water from freezing at -10°C (kf = 1.86°C/m for water)
A physician studying a particular variant of hemoglobin associated with sickle cell anemia must first determine its molar mass, which she will do by measuring its osmotic pressure. She dissolves 21.5mg of hemoglobin in water at 5.0°C to make 1.50mL of solution and measures an osmotic pressure of 3.61 torr. What is the molar mass of this variety of hemoglobin
A 0.952-g sample of magnesium chloride is dissolved in 100. g of water in a flask.
The MgCl2 in the above problem has a density of 1.006g/mL at 20.0°C. What is the osmotic pressure of the solution?
(a) Which scene depicts the solution best?Practice
(b) What is the amount (mol) represented
by each green sphere?
(c) Assuming the solution is ideal, what is its freezing point (at 1 atm)?