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1 | |
Consider the molecular substances I2, H2O, and C8H18. Which of them is/are soluble in CCl4?
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| | A) | only I2 |
| | B) | only H2O
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| | C) | only C8H18 |
| | D) | I2 and C8H18 |
| | E) | H2O and C8H18 |
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2 | |
Which of the following is not a solution?
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| | A) | brass
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| | B) | stainless steel
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| | C) | solder
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| | D) | bronze
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| | E) | galvanized iron
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3 | |
The heat of solution of KCl is +17 kJ/mol, and the heat of hydration of 1 mole of gaseous chloride ions and 1 mole of gaseous potassium ions is -698 kJ. What is the lattice energy of potassium chloride?
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| | A) | 715 kJ/mol
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| | B) | -681 kJ/mol
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| | C) | -715 kJ/mol
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| | D) | -332 kJ/mol
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| | E) | 681 kJ/mol
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4 | |
Which of the following statements is true?
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| | A) | The solubility of all salts in water increases with temperature.
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| | B) | The solubility of all salts in water decreases with temperature.
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| | C) | The solubility of all salts in water is independent of temperature.
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| | D) | The impact of temperature on solubility depends on the individual salt.
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| | E) | Salts are insoluble in water.
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5 | |
The solubility of a gas in general _________ with increasing pressure and __________ with increasing temperature.
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| | A) | decreases, increases
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| | B) | decreases, decreases
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| | C) | remains the same
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| | D) | increases, increases
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| | E) | increases, decreases
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6 | |
The molality of a solution of ethyl alcohol, C2H5OH, in water is 0.96 mol/kg. How many grams of alcohol are dissolved in 5.98 kg of water?
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| | A) | 7.40 g
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| | B) | 287.2 g
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| | C) | 74.1 g
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| | D) | 264.7 g
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| | E) | 740 g
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7 | |
What is the mass of C12H22O11 in 60.0 mL of 0.0880 M solution?
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| | A) | 0.181 g
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| | B) | 1.81 g
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| | C) | 5.02 g
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| | D) | 5.28 g
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| | E) | none of the above
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8 | |
The alloy AlNi 120 is 13% Al, 27% Ni, and 60% Fe by weight. What is the mole percent Al for this alloy?
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| | A) | 24%
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| | B) | 13%
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| | C) | 50%
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| | D) | 32%
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| | E) | none of the above
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9 | |
What is the molarity of a solution that is 46% by mass perchloric acid (HClO4)? The density of the solution is 1.23 g/mL.
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| | A) | 5.6 M |
| | B) | 1.2 M |
| | C) | 1.7 M |
| | D) | 7.9 M |
| | E) | none of the above
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10 | |
What is the percent KCl by mass in a 3.00 molal solution?
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| | A) | 0.300%
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| | B) | 12.5%
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| | C) | 18.3%
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| | D) | 30.0%
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| | E) | none of the above
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11 | |
What is the freezing point of a solution that contains 12.0 g of glucose (C6H12O6) in 50 g of acetic acid (CH3COOH). Kf = 3.90°C/m, melting point = 16.6 °C.
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| | A) | -1.41°C
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| | B) | -31.27°C
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| | C) | 16.32 °C
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| | D) | 5.2 °C
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| | E) | 11.4°C
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12 | |
The osmotic pressure of a solution of a synthetic polyisobutylene in benzene was determined at 25 °C. A sample containing 0.30 g of solute per 125 mL of solution developed a rise of 3.4 mm at osmotic equilibrium. The density of the solution was 0.88 g/mL. What is the molar mass of the polyisobutylene?
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| | A) | 2.1 x
106 g/mol
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| | B) | 2.4 x
105 g/mol
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| | C) | 1.2 x
105 g/mol
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| | D) | 2.9 x
105 g/mol
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| | E) | 2.0 x
105 g/mol
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13 | |
The vapor pressure of pure water at 26 °C is 25.21 torr. What is the vapor pressure of a solution which contains 16.0 g of glucose, C6H12O6, in 80 g of water?
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| | A) | 16.8 torr
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| | B) | 24.7 torr
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| | C) | 0.49 torr
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| | D) | 25.4 torr
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| | E) | 14.1 torr
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14 | |
The osmotic pressure of a 0.72 M solution of HCl is 35.9 atm at 18°C. Calculate the van't Hoff factor i for HCl at this concentration.
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| | A) | 67.5
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| | B) | 4.17
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| | C) | 33.7
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| | D) | 0.18
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| | E) | 2.09
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15 | |
Which of the following pairs of phases cannot form a colloidal solution?
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| | A) | solid and liquid
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| | B) | liquid and gas
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| | C) | solid and solid
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| | D) | liquid and liquid
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| | E) | gas and gas
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