Multiple Choice Identify the
choice that best completes the statement or answers the question.
|
|
1.
|
A substance that does NOT conduct an electric current when it forms a solution
is a(n) ____.
a. | electrolyte | c. | liquid | b. | nonelectrolyte | d. | solid |
|
|
2.
|
A solution that contains all of the solute it can hold at a given temperature is
____.
a. | diluted | c. | supersaturated | b. | saturated | d. | unsaturated |
|
|
3.
|
When a gas is dissolved in a liquid, the gas dissolves faster if the liquid is
____.
a. | cooled | c. | heated | b. | an electrolyte | d. | under low
pressure |
|
|
4.
|
Which of the following combinations would increase the solubility of a gas in a
liquid?
a. | Decrease the pressure and decrease the temperature. | b. | Decrease the
pressure and increase the temperature. | c. | Increase the pressure and decrease the
temperature. | d. | Increase the pressure and increase the temperature. |
|
|
5.
|
Which of the following will speed up the dissolving of a solid solute in
water?
a. | Cool the solution. | c. | Grind up the solvent. | b. | Freeze the
solute. | d. | Stir the
solution. |
|
|
6.
|
A substance that speeds up a chemical reaction without being permanently changed
itself is a(n) ____.
a. | catalyst | c. | inhibitor | b. | coefficient | d. | reactant |
|
|
7.
|
____ change color in the presence of an acid or a base.
a. | Acids | c. | Buffers | b. | Glycerins | d. | Indicators |
|
|
8.
|
Coffee has a pH of about 5. Coffee is ____.
a. | extremely acidic | c. | somewhat acidic | b. | extremely basic | d. | somewhat basic |
|
|
9.
|
Increasing the surface area of a solid ____.
a. | causes the solid to ionize | c. | slows the rate of
solution | b. | has no effect on the rate of solution | d. | speeds the rate of
solution |
|
|
10.
|
Increasing temperature generally increases the solubility of a solute in a
solvent.
|
|
11.
|
In a solution, the substance that is being dissolved is the ____.
a. | gas | c. | solute | b. | liquid | d. | solvent |
|
|
12.
|
If two liquids are soluble in each other, they are said to be _____.
a. | soluble | c. | miscible | b. | insoluble | d. | immiscible |
|
|
13.
|
The substance in a solution that dissolves another substance is called
___.
a. | solute | c. | electrolyte | b. | solvent | d. | nonelectrolyte |
|
|
|
|
|
14.
|
According to the graph above, about how many grams of KBr are needed to make a
saturated soultion in 100 g of water at 30° C?
|
|
15.
|
According to the graph above, which salt is more soluble in water KCl or
KBr?
|
|
16.
|
According to the graph above, at what temperature is the solubility of KBr the
same as KNO3?
|
|
17.
|
According to the graph above, what kind of solution would you have if you
dissolved 10 g of KCl in 100 g of water at 0°C?
a. | saturated | c. | supersaturated | b. | unsaturated | d. | polysaturated |
|
|
18.
|
According to the graph above, which of the following substance’s
solubility increases the least as temperature goes up?
a. | potassium nitrate | c. | potassium chloride | b. | potassium bromide | d. | sodium chloride |
|
|
19.
|
According to the graph, how many grams of KCl wil form a saturated solution in
100 g of water at 60°C?
|
|
|
SOLUBILITY OF SUBSTANCES IN WATER AT
20°C | Solid Substances | Solubility in g/100 g of
Water | Barium sulfate Lithium carbonate Potassium chloride Sodium
nitrate Lithium bromide | 0.00025 1.3 34.0 87.6 166.0 | | |
|
|
20.
|
According to the chart above, what type of solution would you have if 1.5 g of
lithium carbonate is dissolved in 100 g of water at 20 °C?
a. | saturated | c. | unsaturated | b. | supersaturated | d. | polysaturated |
|
|
21.
|
According to the chart above, what type of solution would you have if 166.0 g of
lithium bromide is dissolved in 100 g of water at 20 °C?
a. | saturated | c. | unsaturated | b. | supersaturated | d. | polysaturated |
|
|
22.
|
A mixture with particles that will settle out if left undisturbed is a(n)
___.
a. | suspension | c. | colloid | b. | emulsion | d. | electrolyte |
|
|
23.
|
A solution in which the solvent is water is called ___.
a. | concentrated | c. | aqueous | b. | dilute | d. | amphoteric |
|
|
24.
|
A solution is made by dissolving 17.0 g of Lithium iodide in enough water to
make 500.0 mL of solution. What is the molarity of the solution?
a. | 34 M | c. | 0.25 M | b. | 0.034 M | d. | 2.54 x
10-4 |
|
|
25.
|
Calculate the molarity of a water soluiton of CaCl2 made by
dissolving 612 g of CaCl2 in 5.04 L of solution.
a. | 1.09 M | c. | 0.775 M | b. | 22.0 M | d. | 1.88 M |
|
|
26.
|
What is the molarity of an aqueous solution containing 40.0 g of glucose
(C6H12O6) in 1.5 L of solution?
a. | 27 M | c. | 0.22 M | b. | 60 M | d. | 0.15 M |
|
|
27.
|
What is the molarity of an aqueous solution containing 14.2 g of NaCl dissolved
in 2000 mL of solution?
a. | 7.1 M | c. | 0.12 M | b. | 0.24 M | d. | 3.6 M |
|
|
28.
|
____________ are the products of a neutralization reaction between a strong acid
& a strong base.
a. | water & acid | c. | water & salt | b. | base & salt | d. | acid & base |
|
|
29.
|
A ___ solution contains more hydroxide ions that it does hydrogen ions.
a. | acidic | c. | neutral | b. | basic | d. | saturated |
|
|
30.
|
Since nitric acid is a ____ acid, it ionizes completely in solution
a. | concentrated | c. | strong | b. | dilute | d. | weak |
|
|
31.
|
The negative logarithm of the hydrogen ion concentration is ___.
|
|
32.
|
The substances produced when KOH neutralizes HCl are
a. | KH + ClOH | c. | KClH + OH | b. | KCl + H2O | d. | HOH +
KCl2 |
|
|
33.
|
Which expression represents the pH of a solution?
a. | log [H+] | c. | antilog
[-pOH] | b. | - log [H+] | d. | -antilog
[pOH] |
|
|
34.
|
Which is a strong base?
a. | H2O | c. | NaOH | b. | CH4 | d. | HCH3COO |
|
|
35.
|
The formula for the products between sodium hydroxide and sulfuric acid are
___.
a. | NaSO4 + H2O | c. | NaS2 +
H2O | b. | Na2SO4 + H2O | d. | NaH + SOH |
|
|
36.
|
If 50.0 ml of a 0.500 M solution of HCl is diluted to 150.0 ml, what will the
final molarity be?
a. | 0.667 | c. | 1.50 | b. | 5.99 | d. | 0.167 |
|
|
37.
|
What would the final volume of a solution be if 5.0 mL of a 0.040 M stock
solution is diluted to 0.030 M?
a. | 6.67 | c. | 0.00244 | b. | 0.150 | d. | 416 |
|
|
38.
|
What explains the solubility of ionic substances in water?
a. | water is polar | c. | water is poly polar | b. | water is nonpolar | d. | water dissolves
everything |
|
|
39.
|
A chemist is having some difficulty getting a yellow crystalline solid compound
to dissolve in water. What strategy might she employ to increase the solubility of the
solid?
a. | heat the solution | c. | shake it | b. | grind up the solid | d. | all of these would
work |
|
|
40.
|
A student pours a sample of a clear liquid – whose identify is unknown
– into a test tube of water. The water and the liquid form two distinct layers, with the
unknown on the bottom. What is true of the system?
a. | the two solutions are miscible | c. | the density of the unknown liquid
is less dense than the water | b. | the unknown solution is non
polar | d. | the two are soluble
in each other |
|
|
41.
|
Weak acids and bases produce what type of ions in solution?
a. | many | c. | H+ ions only | b. | only a few | d. | OH- ions
only |
|
|
42.
|
A substance that slows down a chemical process is called what?
a. | exothermic | c. | inhibitor | b. | endothermic | d. | catalyst |
|
|
43.
|
What happens to the rate of a reaction if the temperature is lowered?
a. | it speeds up | c. | it stays the same | b. | it slows down |
|
|
44.
|
What is the minimum energy required for an effective collision called?
a. | joule | c. | kinetic energy | b. | calorie | d. | activation
energy |
|
|
45.
|
What is the primary reason that an increase in temperature results in an
increase in reaction rates?
a. | it has greater potential energy | c. | there are less
calories | b. | it has greater kinetic energy | d. | the molecules hit each other
less |
|
|
46.
|
To react, what must gas particles do?
a. | bounce off each other | c. | collide with opposing orientation
| b. | collide with the correct orientation | d. | get close to each
other |
|
|
47.
|
To slow down the rate of reaction, what would you do?
a. | increase the concentration of the reactants | c. | lower the
temperature | b. | increase the surface area of the reactants | d. | adding a
catalyst |
|
|
|
|
|
48.
|
Which energy difference in the reaction profile
below corresponds to the activation energy for the forward reaction?
|
|
49.
|
What type of solution that contains less solute than it is able to hold at a
given temperature?
a. | saturated | c. | supersaturated | b. | unsaturated | d. | poly satuated |
|
|
50.
|
What type of solution that contains more solute than it can hold at a given
temperature?
a. | saturated | c. | supersaturated | b. | unsaturated | d. | poly saturated |
|
|
51.
|
What is the general rule for solubility?
a. | like dissolves unlike | c. | like dissolves like | b. | unlike dissolves unlike | d. | unlike dissolves
like |
|
|
52.
|
If a crystal is added to an aqueous solution and it causes many crystals to come
out of the solution, what type of solution was it originally?
a. | saturated | c. | supersaturated | b. | unsaturated | d. | poly saturated |
|
|
53.
|
What term refers to the ease with which an acid or base forms ions in
solution?
a. | pH | c. | base | b. | acid | d. | strength |
|
|
54.
|
What type of solution contains more hydrogen ions than it does hydroxide
ions?
a. | acid | c. | neutral | b. | base | d. | amphoteric |
|
|
55.
|
What will increase the rate of reaction?
a. | lower the temperature | c. | stir | b. | decreast the surface area | d. | grind up the
solvent |
|
|
56.
|
What will happen to the rate of reaction if the surface area of reactants is
increased?
a. | speed up | c. | remains constant | b. | slow down | d. | unable to tell with this
information |
|
|
57.
|
What is the molarity of a solution made by dissolving 34.0 g of sodium chloride
(NaCl) in enough water to make 500 mL of solution?
a. | 0.068 | c. | 1.16 | b. | 68 | d. | 0.00232 |
|
|
58.
|
Calculate the molarity of a water solution of KCl, given that 2.50 L of the
solution contains 350 g of KCl.
|
|
59.
|
What would the final volume of a solution be if 25.0 mL of a 1.0 M stock
solution is diluted to 0.50 M?
|
|
60.
|
What is the molarity of a solution containing 9.0 moles of a solute in 500.0 mL
of solution?
|
|
61.
|
What would the final volume of a solution be if 6.0 mL of a 0.050 M stock
solution is diluted to 0.020 M?
|
|
62.
|
If 40.0 ml of a 0.400 M solution of HCl is diluted to 50.0 ml, what will the
final molarity be?
|