Which of the following usually makes a substance dissolve faster in a solvent?
A) agitating the solution
What is the maximum amount of KCl that can dissolve in 200 g of water a 20C?
C) 68g
How does shaking or stirring a mixture of solute and solvent affect a solution?
A) it increase the rate of dissolving
Which of the following factors affect solubility?
A) temo and pressure
Which of the following substance is less soluble in hot water than in cold?
B) NaCl
Which of the following generally occurs as temp increases?
B) solubility of a solid solute increases
Which phrase correctly describes the effect of pressure on the solubility of a gas in a liquid?
D) unrelated to the pressure of face above the liquid
If the solubility of a particle solute is 10/100 at 20�c, which of the following concentrations would represent a supersaturated solution of that solute?
D) 11/100
What happens to the solubility of a gas in a liquid if the partial pressure of the gas above the liquid decreases?
A) the solubility decreases
To increase the solubility of a gas at constant temp from 1.2g/l at 1.4 atm, to 2.3g/l, the pressure would have to be increased to?
D) 2.7 atm
What is the concentration of a solution?
B) a measure of the amount of solute is a specified quantity of solvent
In which of the following is the solution concentration expressed in terms of molarity?
D) 10mol/1L
Which of the following operations yields the number of moles of solute?
B) molarity x moles of solution
What is the molarity of a solution containing 56 grams of solute in 959mL of solutions?
B) 2.2 M
What mass of sucrose, is needed to make 500 mL of a .200M solution?
A) 34.2 g
Which of the following in unchanged when a solution is diluted by the addition of solvent?
C) number of moles of a solute
The volume of 6M HCl needed to make 319mL of 6.8M HCl is?
D) 362mL
If 2.9 mL of 6 M HCl is used to make a 500 mL solution, what is the molarity of the dilute solution?
A) .024M
If the percent (mass/mass) for a solute is 4% and the mass of the solution in 200g, what is the mass of solute in solution?
A) 8.0g
The volume of alcohol present in 620 mL of a 40% (v/V0 solution of alcohol is?
C) 248mL
Which of the following is a colligative property of a solution?
A) boiling point elevation
Colligative properties depend upon the?
C) number of solute particles in a solution
A solute depresses the freezing point because the solute?
B) disrupts crystal formation of the solvent
What is the mole fraction of ethanol in a solution of 3 moles of ethanol and 5 moles of water?
B) 0.6
What is the molality of a solution containing 8 grams of solute in .5 kg solvent?
A) .67m
What is the number of kilograms of solvent in a .70 molal solution containing 5 grams of solute?
A) .24kg
To which of the following variables is change in boiling point directly proportional?
B) molality of solution
What is the freezing point of a solution of .5 mol of LiBr in 500 grams of water?
B) -3.72�C
What is the boiling point of a solution that contains 30 grams of FeCl? in 2000 grams of water?
D) 100.189�C
What is the approx molar mass of a molecular solute in 300 grams of the solute in 1000 grams of water causes the solution to have a boiling point of 101�C?
C) 150g/mol