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CRT Study Guide Day 1 (#1-62)



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.
a.
true
b.
false
 

 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
 
 
nar001-1.jpg
 

 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?
a.
25
c.
100
b.
70
d.
50
 

 15. 

According to the graph above, which salt is more soluble in water KCl or KBr?
a.
KCl
b.
KBr
 

 16. 

According to the graph above, at what temperature is the solubility of KBr the same as KNO3?
a.
80
c.
160
b.
50
d.
70
 

 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?
a.
50
c.
30
b.
75
d.
90
 
 
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 CaClmade 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 ___.
a.
strong
c.
pH
b.
weak
d.
pOH
 

 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
 
 
nar003-1.jpg
 

 48. 

Which energy difference in the reaction profile below corresponds to the activation energy for the forward reaction?
a.
w
c.
y
b.
x
d.
z
 

 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.
a.
140
c.
4.69
b.
0.007
d.
1.88
 

 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?
a.
50
c.
25
b.
0.02
d.
0.01
 

 60. 

What is the molarity of a solution containing 9.0 moles of a solute in 500.0 mL of solution?
a.
0.018
c.
0.1
b.
18
d.
5
 

 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?
a.
2.4
c.
0.067
b.
0.417
d.
15
 

 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?
a.
0.32
c.
0.50
b.
3.13
d.
2.00
 



 
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