Units
Problem Solving
Colligative Properties
Solubility
100
What is Molarity
moles solute/ L of solution
100
What is the mass percent of a solution with a mass fraction of 0.43?
43%
100
What is this equation for?
Vapor Pressure Lowering
100
What would a polar solvent dissolve?
A polar solute
200
What is Molality
moles solute/ kg solvent
200
What is the molarity of a solution with 2 moles of solute in 2 L of solution?
1 M
200
What is freezing point?
solid and liquid phase are in equilibrium
200
What would a nonpolar solvent dissolve
a nonpolar solute
300
What is Mole Fraction
moles of solute (or solvent)/ total moles
300
We have 30g of a solute with a molar mass of 932 g/mol. We are using 200g of a solvent with a molar mass of 18.01528 g/mol. We have 400mL of solution. Find molarity, molality, mol fraction of solute and solvent, mass percent of solute and solvent, and mass fraction of solute and solvent.
Molarity- 0.080, molality- 0.16, mol frac (solute)- 0.0029, mol frac (solv)- 0.9971, mass percent (solute)- 13.043, mass percent (solv)- 86.96, mass frac (solute)- 0.13043, mass frac (solv)- 0.8696
300
Why do we add salt to water when cook?
It causes the boiling point to increase, causing the water to be hotter and causing food to cook faster
300
What does hydrophobic mean? What does hydrophilic mean?
water fearing
water loving
400
What is Mass Percent
mass fraction * 100%
400
We have 14g of a solute with a molar mass of 732.6 g/mol. We are using 150g of a solvent with a molar mass of 18.01528 g/mol. We have 300mL of solution. Find molarity, molality, mol fraction of solute and solvent, mass percent of solute and solvent, and mass fraction of solute and solvent.
Molarity- 0.064, molality- 0.13, mol frac (solute)- 0.0023, mol frac (solv)- 0.9977, mass percent (solute)- 8.537, mass percent (solv)- 91.46, mass frac (solute)- 0.08537, mass frac (solv)- 0.9146
400
What is boiling point?
vapor pressure of solution= atmospheric air pressure
400
Is this molecule soluble in water?
Yes, it is polar
500
What is Normality
molarity*number of equivalents
500
We have 20g of a solute with a molar mass of 235.6 g/mol. We have 200g of water as our solvent with a molar mass of 18.01528 g/mol. Our solution has a density of 0.95 g/mL. Find molarity, molality, mol fraction of solute and solvent, mass percent of solute and solvent, and mass fraction of solute and solvent.
Molarity- 0.367, molality- 0.42, mol frac (solute)- 0.0076, mol frac (solv)- 0.9924, mass percent (solute)- 9.091, mass percent (solv)- 90.91, mass frac (solute)- 0.09091, mass frac (solv)- 0.9091
500
What does adding salt to the road do in the winter?
It lowers the freezing point, making the road need to be colder to freeze
500
Is this molecule soluble in water?
No, it's nonpolar