CHEM II EXAM 2 CONNECT EXAM QUESTIONS AND ANSWERS GRADED A+ 2025/2026

CHEM II EXAM 2 CONNECT EXAM
QUESTIONS AND ANSWERS GRADED A+
2025/2026




A saturated solution - ANS 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) - ANS 2, 3

2: makes hydrogen bonds with water



In which of the following solvents would you expect KBr to be most soluble? -
ANS CH3CH2OH (ethanol)



Which of the following liquids would make a good solvent for iodine, I2?

HCl

H2O

CH3OH

NH3

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, CS2 - ANS CS2



Which of the following compounds should be soluble in CCl4?

NaCl

H2O

NaOH

C8H18 - ANS 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 - ANS 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% - ANS 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? - ANS 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 - ANS 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? - ANS 2.27 M

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