Portage learning CHEM 104 Final Exam
Questions and Answers ()
(Verified Answers)
what can serve as the solvent in a solution? liquid, solid, gas, or all of the above. - Answer--all of the
above
a homogeneous mixture consists of 12% ethanol, 28% methanol, and 60% water. what is the solvent?
water, methanol, ethanol, or ethanol + methanol - Answer--water
in a solution, the solute is: - Answer--the substance that is dissolved
example of colloid: grape juice, homogenized milk, blood, or kool-aid. - Answer--homogenized milk
example of suspension: blood, homogenized milk, apple juice, or mayo. - Answer--blood
unknown liquid that is insoluble in water but not in benzene (an aromatic hydrocarbon solvent). what
type of molecule is unknown? polar, nonpolar, neither polar or non polar, or both polar and non polar -
Answer--nonpolar
,solubility of _________ in water decreases as temperature increases. liquids, solids, or gases? - Answer--
gases
which compound will be most soluble in hexane?
CH3CH2OH CH3OH
CH3CH2CH2OH - Answer--CH3CH2CH2OH
water solution of sodium chloride is a good conductor of electricity. due to this property, table salt is
classified as a(n):
weak electrolyte, strong electrolyte, non-electrolyte, or semi-electrolyte - Answer--strong electrolyte
example of a weak electrolyte
MgCl2, HC2H3O2, HNO3, or KOH - Answer--HC2H3O2
in order to prevent the process off either crenation or hemolysis with red blood cells an intravenous
solution concentration should be__________ to the concentration of blood.
calculate mass percent of a solution prepared by dissolving 34.4g NaCl in 298 g of water.
a 10.35%
b 11.51 %
c 0.103 %
d 0.115 %
e none of the above - Answer--a 10.35%
,what is 75% of 375? - Answer--281.3
percent mass/volume ( % m/v ) of solution that is made from putting 25.0g of NaCl in 275 mL of water?
a 0.0909% w/v
b 9.09% w/v
c 8.33% w/v
d 10.9 % w/v
e none of the above - Answer--b 9.09% w/v
% v/v concentration of a sample of wine that contains 15 mL of ethyl alcohol in 200 mL of wine?
a 0.075 % v/v
b 6.9% v/v
c 0.75% v/v
d 0.069% v/v
e 7.5% v/v - Answer--e 7.5% v/v
glucose concentration in pp of a solution made by mixing 23.2 mg glucose with 2.000 L?
8.62ppm
11.6 ppm
1.16 ppm
0.862 ppm
none of the above - Answer--11.6 ppm
, calculate volume in L of a solution that contains 3.12 moles of NaCk if the concentration of this solution
is 6.67 M NaCl?
2.14 L
20.8 L
46.8 L
0.468 L
none of the above - Answer--0.468 L
what is the concentration in ppb of a solution that contains15 mg of a toxic metal in 1250 mL of a
solution?
12,000 ppb
6000 ppb
18000 ppb
24000 ppb
12.0 ppb - Answer--12,000 ppb
a bronsted-lowry ACID is defined as a substance which:
increases h+ when placed in water
decreases h+ when placed in water
acts as a proton acceptor in any system
acts as a proton donor in any system - Answer--acts as a proton donor in any system
a bronsted-lowry BASE is defined as a substance which:
Questions and Answers ()
(Verified Answers)
what can serve as the solvent in a solution? liquid, solid, gas, or all of the above. - Answer--all of the
above
a homogeneous mixture consists of 12% ethanol, 28% methanol, and 60% water. what is the solvent?
water, methanol, ethanol, or ethanol + methanol - Answer--water
in a solution, the solute is: - Answer--the substance that is dissolved
example of colloid: grape juice, homogenized milk, blood, or kool-aid. - Answer--homogenized milk
example of suspension: blood, homogenized milk, apple juice, or mayo. - Answer--blood
unknown liquid that is insoluble in water but not in benzene (an aromatic hydrocarbon solvent). what
type of molecule is unknown? polar, nonpolar, neither polar or non polar, or both polar and non polar -
Answer--nonpolar
,solubility of _________ in water decreases as temperature increases. liquids, solids, or gases? - Answer--
gases
which compound will be most soluble in hexane?
CH3CH2OH CH3OH
CH3CH2CH2OH - Answer--CH3CH2CH2OH
water solution of sodium chloride is a good conductor of electricity. due to this property, table salt is
classified as a(n):
weak electrolyte, strong electrolyte, non-electrolyte, or semi-electrolyte - Answer--strong electrolyte
example of a weak electrolyte
MgCl2, HC2H3O2, HNO3, or KOH - Answer--HC2H3O2
in order to prevent the process off either crenation or hemolysis with red blood cells an intravenous
solution concentration should be__________ to the concentration of blood.
calculate mass percent of a solution prepared by dissolving 34.4g NaCl in 298 g of water.
a 10.35%
b 11.51 %
c 0.103 %
d 0.115 %
e none of the above - Answer--a 10.35%
,what is 75% of 375? - Answer--281.3
percent mass/volume ( % m/v ) of solution that is made from putting 25.0g of NaCl in 275 mL of water?
a 0.0909% w/v
b 9.09% w/v
c 8.33% w/v
d 10.9 % w/v
e none of the above - Answer--b 9.09% w/v
% v/v concentration of a sample of wine that contains 15 mL of ethyl alcohol in 200 mL of wine?
a 0.075 % v/v
b 6.9% v/v
c 0.75% v/v
d 0.069% v/v
e 7.5% v/v - Answer--e 7.5% v/v
glucose concentration in pp of a solution made by mixing 23.2 mg glucose with 2.000 L?
8.62ppm
11.6 ppm
1.16 ppm
0.862 ppm
none of the above - Answer--11.6 ppm
, calculate volume in L of a solution that contains 3.12 moles of NaCk if the concentration of this solution
is 6.67 M NaCl?
2.14 L
20.8 L
46.8 L
0.468 L
none of the above - Answer--0.468 L
what is the concentration in ppb of a solution that contains15 mg of a toxic metal in 1250 mL of a
solution?
12,000 ppb
6000 ppb
18000 ppb
24000 ppb
12.0 ppb - Answer--12,000 ppb
a bronsted-lowry ACID is defined as a substance which:
increases h+ when placed in water
decreases h+ when placed in water
acts as a proton acceptor in any system
acts as a proton donor in any system - Answer--acts as a proton donor in any system
a bronsted-lowry BASE is defined as a substance which:
