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Lesdesma Pre AP Chem Final 2012
Chemistry FInal
67
Chemistry
10th Grade
05/28/2012

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Term
1. Which of the following would decrease the rate of solution when dissolving a solid in water?
Definition
use a single cube of solid
Term
2.Which type of solution has achieved equilibrium, between solute and solvent, when the solute is still visible after mixing?
Definition
a saturated solution
Term
3. If the amount of solute present in a given solution is more than could be dissolved at a given temperature, then the solution is -
Definition
supersaturated
Term
4. When the amount of solute cannot remain in solution at a given temperature, then the solution is -
Definition
saturated
Term
5. Which of the statements below describes a solution in equilibrium?
Definition
the rate of crystallization and the rate of dissolution are equal
Term
6. What units are used to describe the solubility of a substance in a given solution?
Definition
amount of solute per amount of solvent
Term
7. The expression "like dissolves like" refers to which property of molecules?
Definition
polarity of the molecule
Term
8. Which substance would NOT dissolve into a polar solvent?
Definition
nonpolar molecule
Term
9. What will happen to the ability of a gas to dissolve in a liquid if the temperature increases?
Definition
solubility of the gas decreases
Term
10. What will happen to the ability of a solid to dissolve in a liquid if the temperature increases?
Definition
solubility of the solid usually increases
Term
11. Which of the following is the best way to determine if an aqueous solution of sodium acetate (NaC2H3O2) is supersaturated?
Definition
Add a crystal of NaC2H3O2 to the solution.
Term
12. What part of a solution is dissolved when a solution is mixed?
Definition
the solute
Term
13. Any substance that does NOT conduct electricity when in solution is called a(n) -
Definition
nonelectrolyte
Term
14. At a given temperature, a solution that contains all of the solute possible is -
Definition
saturated
Term
15. What is the process of separating the positive and negative ions of a crystalline solid?
Definition
dissociation
Term
16. Which of the following would be the effect of increasing the surface area of a solid?
Definition
increase the rate of dissolving
Term
17. Which of the following would cause a gas to dissolve faster into a solution?
Definition
cool the gas and solution
Term
18. A mixture of metals in a solid solution is called a(n) -
Definition
alloy
Term
19. Any molecule that is positively charged on one side and negatively charged on the other is -
Definition
polar
Term
20. Which of the following would increase the solubility of a solid in a solution?
Definition
stir the solid and solution
Term
21. Which of the following is NOT a heterogeneous mixture?
Definition
water
Term
22. A homogeneous mixture of substances that is in a single phase is called -
Definition
a solution
Term
23. A suspension is when -
Definition
particles settle out of solution unless mixed
Term
24. A colloid is a mixture in a dispersed phase where the particles are -
Definition
not falling out of solution
Term
25. Which factor effects the solubility of a solution?
Definition
the type of solute and the temperature of the solution
Term
26. While stirring, solid table salt is added to a beaker of water until no more salt will dissolve and salt crystals are visible at the bottom of the beaker. When the beaker is heated, the crystals dissolve. The effect of heat in this situation —
Definition
weakened the bonds in the salt crystals
Term
27. When does the ideal gas law match the behavior of a real gas?
Definition
when the gas particles are far apart
Term
28. Which of the following describes pressure?
Definition
the force per unit of surface area
Term
29. Atmospheric pressure is measured with a —
Definition
barometer
Term
30. A pressure of 350 mm Hg equals —
Definition
350 torr
Term
31. Which of the following is the value for Standard Temperature?
Definition
0oC
Term
32. Which of the following is the value for Standard Pressure?
Definition
1 atm
Term
33. If the temperature of a gas changes, but the amount and volume remain constant, which of the following values must also change?
Definition
pressure
Term
34. When driving, the pressure in the tires increases due to —
Definition
air particles increasing temperature due to more collisions
Term
35. Which of the following gas laws is calculated with the pressure and volume variables at a constant temperature?
Definition
Boyle's law
Term
36. What is the new pressure of 150 mL of a gas that is compressed to 50 mL, when the original pressure was 3.0 atm and the temperature is held constant?
Definition
9
Term
37. The average kinetic energy of the particles in a sample of matter is measured as -
Definition
the temperature
Term
38. The more kinetic energy there is in a sample of matter, then the —
Definition
higher the temperature
Term
39. The heat required to raise the temperature of 1g of a substance by 1 o C is the -
Definition
specific heat
Term
40. Which of the following is used to express the measurement of specific heat?
Definition
J/g o C
Term
41. What is the term for the amount of energy absorbed or released in a chemical reaction?
Definition
heat of reaction
Term
42. Which of the following is a chemical reaction?
Definition
Magnesium metal is burned in oxygen.
Term
43. Which of the following would be a physical change?
Definition
ice melting
Term
44. Which of the statements is FALSE regarding the products of a chemical reaction?
Definition
The states of matter of the products and reactants are the same.
Term
45. Which of the following statements regarding freezing is CORRECT?
Definition
All liquids have a freezing point.
Term
46. Which of the following must happen for condensation to occur?
Definition
The concentration of the vapor must be above zero.
Term
47. Which of the following would be used to determine the various states in which a substance can exist?
Definition
Phase diagram
Term
48. Which of the following causes a change in state from liquid to gas?
Definition
high kinetic energy
Term
49. What process takes place when the average energy of a gas’s particles decreases?
Definition
condensation
Term
50. If melting rate and freezing rate are NOT the same, then the system is -
Definition
not in equilibrium
Term
51. If the concentration of the vapor is increasing, then which of the following is the cause?
Definition
The rate of evaporation is greater than the rate of condensation.
Term
52. Which of the following describes the process of sublimation?
Definition
moving from solid to gas
Term
53. A mixture is?
Definition
physically combined
Term
54. In a solution, the substance that does the dissolving is called a/an
Definition
a solvent
Term
55. Water is a compound composed of?
Definition
2 hydrogen atoms and one oxygen atom
Term
56. What processes will not increase the rate of dissolving a solid in a liquid?
Definition
cooling the solution
Term
57. Particles smaller than the atom are called?
Definition
subatomic particles
Term
58. Lithium has an atomic number of 3 and a mass of 7. How many protons and neutrons are present?
Definition
3 protons and 4 neutrons
Term
59. The unit of length in the metric system is
Definition
kilometer
Term
61. The prefix kilo means
Definition
one thousand
Term
62. Weight is?
Definition
the response of mass to the pull of gravity
Term
63. Matter is anything that has?
Definition
mass and volume
Term
64. One molecule of H2SO4 contains how many atoms?
Definition
2 hydrogen atoms; 1 sulfur atom; 4 oxygen atoms
Term
65. Atoms of the same element that have the same number of protons but different number of neutrons are called?
Definition
isotopes
Term
66. A substance that changes color in the presence of an acid or a base is called a/an
Definition
indicator
Term
67. The pH of an acid ranges from
Definition
less than 7
Term
68. The pH of strong base ranges from
Definition
close to 14
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