Chem II Exam 2 Connect UPDATED
QUESTIONS AND CORRECT ANSWERS
A saturated solution - CORRECT ANSWER contains the maximum amount of solute
that will dissolve in that solvent at that temperature
Which response lists all the following pairs that are miscible liquids?
Pair #1: octane (C8H18) and water
Pair #2: acetic acid (CH3COOH) and water
Pair #3: octane (C8H18) and carbon tetrachloride(CCl4) - CORRECT ANSWER 2, 3
2: makes hydrogen bonds with water
In which of the following solvents would you expect KBr to be most soluble? - CORRECT
ANSWER CH3CH2OH (ethanol)
Which of the following liquids would make a good solvent for iodine, I2?
HCl
H2O
CH3OH
NH3
CS2 - CORRECT ANSWER CS2
Which of the following compounds should be soluble in CCl4?
NaCl
H2O
NaOH
C8H18 - CORRECT ANSWER C8H18
alculate the mole fraction of KI in a solution made by dissolving 3.4 g of KI in 5.8 g of water.
, 0.060 0.064 0.37 0.59 6.4 - CORRECT ANSWER 0.060
Calculate the mass percent of HOCH2CH2OH in a solution made by dissolving 3.2 g of
HOCH2CH2OH in 43.5g of water.
2.9% 6.9% 7.4% 22% 29% - CORRECT ANSWER 6.9%
A 9.50 % by mass solution of acetone (C3H6O) in water has a density of 0.9849 g/mL at
20°C. What is the molarity of this solution? - CORRECT ANSWER 1.61 M
.9849 g/1mL * 1000ml/1L * 9.50g/100g * 1 mol/58.08g
A 15.00 % by mass solution of lactose (C12H22O11, 342.30 g/mol) in water has a density of
1.0602 g/mL at 20°C. What is the molarity of this solution?
0.03097 M 0.4133 M 0.4646 M 1.590 M 3.097 M - CORRECT ANSWER 0.4646 M
A 20.0 % by mass solution of phosphoric acid (H3PO4) in water has a density of 1.114 g/mL
at 20°C. What is the molarity of this solution? - CORRECT ANSWER 2.27 M
What is the molarity of a solution that is 7.00% by mass magnesium sulfate and has a density
of 1.071 g/mL? - CORRECT ANSWER 0.623 M
A 1.35 m solution of NaOCl in water is prepared. What is the mole fraction of the NaOCl? -
CORRECT ANSWER 0.0237
What is the molality of an aqueous KBr solution with a mole fraction of KBr, X, equal to
0.245? - CORRECT ANSWER 18.0 m
A 23.0% by mass LiCl solution is prepared in water. What is the mole fraction of the water? -
CORRECT ANSWER 0.887
QUESTIONS AND CORRECT ANSWERS
A saturated solution - CORRECT ANSWER contains the maximum amount of solute
that will dissolve in that solvent at that temperature
Which response lists all the following pairs that are miscible liquids?
Pair #1: octane (C8H18) and water
Pair #2: acetic acid (CH3COOH) and water
Pair #3: octane (C8H18) and carbon tetrachloride(CCl4) - CORRECT ANSWER 2, 3
2: makes hydrogen bonds with water
In which of the following solvents would you expect KBr to be most soluble? - CORRECT
ANSWER CH3CH2OH (ethanol)
Which of the following liquids would make a good solvent for iodine, I2?
HCl
H2O
CH3OH
NH3
CS2 - CORRECT ANSWER CS2
Which of the following compounds should be soluble in CCl4?
NaCl
H2O
NaOH
C8H18 - CORRECT ANSWER C8H18
alculate the mole fraction of KI in a solution made by dissolving 3.4 g of KI in 5.8 g of water.
, 0.060 0.064 0.37 0.59 6.4 - CORRECT ANSWER 0.060
Calculate the mass percent of HOCH2CH2OH in a solution made by dissolving 3.2 g of
HOCH2CH2OH in 43.5g of water.
2.9% 6.9% 7.4% 22% 29% - CORRECT ANSWER 6.9%
A 9.50 % by mass solution of acetone (C3H6O) in water has a density of 0.9849 g/mL at
20°C. What is the molarity of this solution? - CORRECT ANSWER 1.61 M
.9849 g/1mL * 1000ml/1L * 9.50g/100g * 1 mol/58.08g
A 15.00 % by mass solution of lactose (C12H22O11, 342.30 g/mol) in water has a density of
1.0602 g/mL at 20°C. What is the molarity of this solution?
0.03097 M 0.4133 M 0.4646 M 1.590 M 3.097 M - CORRECT ANSWER 0.4646 M
A 20.0 % by mass solution of phosphoric acid (H3PO4) in water has a density of 1.114 g/mL
at 20°C. What is the molarity of this solution? - CORRECT ANSWER 2.27 M
What is the molarity of a solution that is 7.00% by mass magnesium sulfate and has a density
of 1.071 g/mL? - CORRECT ANSWER 0.623 M
A 1.35 m solution of NaOCl in water is prepared. What is the mole fraction of the NaOCl? -
CORRECT ANSWER 0.0237
What is the molality of an aqueous KBr solution with a mole fraction of KBr, X, equal to
0.245? - CORRECT ANSWER 18.0 m
A 23.0% by mass LiCl solution is prepared in water. What is the mole fraction of the water? -
CORRECT ANSWER 0.887
