Chem124L Final Exam spring 2021 - Sharon Liu 2022 questions & answers
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Grado
CHEM 124
Institución
CHEM 124
) Classify solutions with the following characteristics acidic, basic or neutral:
pH = 10 pH = 4 pH = 7.3 pH = 6
a) Basic, acidic, basic, acidic
b) Neutral, acidic, basic, acidic
c) Basic, acidic, neutral, acidic
d) Basic, acidic, neutral, basic
2) The curved surface that is apparent in a nar...
chem124l final exam spring 2021 sharon liu 2022 questions amp answers
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Chem 124L: Final Exam SP 2021
NAME: Sharon Liu
Instructions: To select the correct answer, highlight or put the entire answer in bold font. To
submit your completed exam, save the complete exam file as a PDF and email the PDF to
your TA by 12:00 PM on May 18th. No late Final Exam submissions will be graded.
1) Classify solutions with the following characteristics acidic, basic or neutral:
pH = 10 pH = 4 pH = 7.3 pH = 6
a) Basic, acidic, basic, acidic
b) Neutral, acidic, basic, acidic
c) Basic, acidic, neutral, acidic
d) Basic, acidic, neutral, basic
2) The curved surface that is apparent in a narrow container is known as a:
a) Delivery mark
b) Meniscus
c) Pipet volume
d) None of the above
3) Mouth pipetting of chemicals is sometimes permitted if transferring non-hazardous
chemicals:
a) True
b) False
4) A saturated solution contains:
a) Less solute per unit volume
b) More dissolved solute per unit volume
c) The amount of solute is in equilibrium with the solvent
d) None of the above
5) Convert a temperature of 90oF to a Celsius value:
a) 32.2
b) 194
c) 67.7
d) 120.2
6) If urine has a density of 1.07 g/ml, what would be the mass of 25 ml of urine?
a) 0.0428 g
b) 23.36 g
c) 26.75 g
d) 25.00 g
This study source was downloaded by 100000830772748 from CourseHero.com on 02-05-2022 00:58:02 GMT -06:00
, 7) Esters can be prepared by reacting an alcohol with a _____:
a) Sodium hydroxide
b) Acetic anhydride
c) Carboxylic acid
d) None of the above
8) The reason pure water has a pH of 7 is that there is the same concentration of hydrogen
and hydroxide ions in the self-ionization of water:
a) True
b) False
9) A solution for which [H+] = 1.0 x 10-5 will have a pH of:
(pH = - log[H+])
a) 11.0
b) 5.0
c) -5.0
d) -9.0
10) Which of the following statements is true for neutral solutions in which water is the
solvent:
a) Neutral solutions contain H3O+ and OH- ions in equal concentration
b) Neutral solutions contain no OH-
c) Neutral solutions contain no H3O+
d) None of the above
11) Attractive forces between solute and solvent molecules are an important factor in solution
formation:
a) True
b) False
12) An ion in solution that is surrounded by water is a(n) _____ ion:
a) Hydrated
b) Osmotic
c) Saturated
d) Colloid
13) A solution made by combining 2.00 g of sugar and 100 mL of water (Density of water =
1.00 g/ml). What is the concentration in % w/w?
a) 20.0
b) 2.0
c) 1.96
d) None of the above
This study source was downloaded by 100000830772748 from CourseHero.com on 02-05-2022 00:58:02 GMT -06:00
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