quiz 6
How many grams of lithium chloride (LiCl) are in 500.0 mL of a solution which is 23.5% (m/V)?
118 g
Which statement concerning solution concentration is FALSE?
A saturated solution contains more than 100 g of dissolved solute.
What is the molarity of a solution if 300.0 mL of it contains 16.8 g of KNO3? [Formula weight: KNO3, 101.11 amu]
.0554 M
How many moles of KCl are present in 50.0 mL of a 0.552 M solution?
0.0276 mol
If 5.20 g of HCl is added to enough distilled water to form 3.00 L of solution, what is the molarity of the solution? [Molecular weight: HCl, 36.46 amu]
0.0475 M
Enough water is added to 50.0 mL of a 0.660 M NaOH solution in order to bring the total volume to 450.0 mL. What is the molarity of this diluted solution?
0.0733 M
A solution contains 1.65 g of NaF in a total volume of 150.0 mL. What is its concentration expressed as % (m/V)?
1.10 %
A patient requires 100.0 g of glucose in the next 12 hours. What volume of a 5.0% (m/V) glucose solution should be administered?
2.0 L
How many grams of KCl are present in 250.0 mL of a 0.125 M solution? [Molar mass: KCl, 74.55 g/mol]
2.33 g KCl
Calculate the molarity of 2.00 L of solution that contains 200.0 g of NaOH. [Formula weight: NaOH, 40.0 amu]
2.50 M
What is the osmotic pressure of a 6.0 × 10-2 M NaCl solution at 20°C (293 K)? [R=0.0821 L atm/mol K]
2.9 atm
Assuming that air is a solution containing four molecules of N2 for every one molecule O2, what is the concentration of O2 in this solution, expressed as % (m/m)? [Formula weights: N2, 28.02 amu; O2, 32.00 amu]
22% (m/m)
What mass of glucose is contained in 500.0 mL of a 5.00% (m/V) solution?
25.0 g
What volume of a 0.1250 M KCl solution contains 2.330 g of KCl? [Formula weight: KCl, 74.55 amu]
250.0 mL
Calculate the mass in grams of NaCl that is present in 500.0 mL of a 0.900% (m/V) solution
4.50 g
If the concentration of Mg2+ in solution is 3.0 × 10-3 M, what is its concentration expressed in meq/L?
6.0 meq/L
Na3PO4 dissolves in water to produce an electrolytic solution. What is the osmolarity of a 2.0 × 10-3 M Na3PO4 solution?
8.0 × 10−3 osmolar
Increasing the pressure of a gas over a solution increases the solubility of the gas in the solution. This is an example corresponding to which law?
Henry's Law
What is the law that states that vapor pressure of the solvent decreases in proportion to the concentration of the solute?
Raoult's Law
Ringer's solution is used in the treatment of burns and wounds. It is prepared by dissolving 8.6 g of NaCl, 0.30 g of KCl, and 0.33 g of CaCl2 in water, and diluting to a volume of 1.0 L. Which of the following is an accurate description of Ringer's solution?
Ringer's solution is an aqueous solution
An unknown amount of water is added to 75 mL of a 3.5 M sodium chloride solution. What can be said for certain about the concentration of the solution that results?
The concentration of the resulting solution will be less than 3.5 M.
A student mixes 4.0 g of KNO3 with 5.0 mL of water at room temperature, and observes that most, but not all, of the KNO3 has dissolved. Which statement concerning this solution is true?
The solubility of KNO3 in water has been exceeded
A solution contains the label 0.2 M KNO3. What is the correct interpretation of this concentration?
There are 0.2 moles of KNO3 in 1 L of solution.
Which of the following correctly describes what happens when red blood cells are placed in a hypertonic solution?
There will be a net movement of water out of the red blood cells, and the cells will shrink and collapse.
Vitamin D is essential for the normal development of teeth and bones. A tablet of Vitamin D is tested for its solubility in water and benzene. The results are shown in the table below. What is the most appropriate interpretation of the solubility results? water benzene (C6H6) insoluble soluble
Vitamin D is likely a nonpolar substance
What happens when a hypotonic solution is separated from a hypertonic solution by an osmotic membrane?
Water molecules move from the hypotonic solution to the hypertonic solution
Which of the following properly describes a colligative property of a solution?
a solution property that depends on the amount of solute particles present
What type of liquid displays the Tyndall effect?
colloidal suspension
What term is used to describe a solution of lower osmolarity compared to one with a higher osmolarity?
hypotonic
The solubility of gases in liquids is highest at _____________________.
low temperature and high pressure
What concentration term is defined as the number of moles of solute per kilogram of solvent in a solution?
molatity
What term describes a solution that is in equilibrium with undissolved solute?
saturated
What type of membrane allows solvent molecules to pass through but do not allow solute molecules to pass through?
semipermeable
What term describes a solution in which the solute concentration exceeds its equilibrium concentration under the prevailing conditions?
supersaturated
The solubility of a solute is best described as which of the following?
the maximum amount of solute that can be dissolved in a specified amount of solvent
One mole of sodium chloride is added to 100 mL of water in beaker A. One mole of glucose, C6H12O6, is added to 100 mL of water in beaker B. How much more will the freezing point of water be lowered in beaker A than in beaker B?
twice as much