College Chemistry Ii Phs 1035 Practice Exam 3 With Answer Key Page 23
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39152) What are the principal organs that regulate the pH of the carbonic acid-bicarbonate buffer system
152)
in the blood?
A) kidneys, liver
B) lungs, kidneys
C) spleen, liver
D) lungs, skin
E) brain stem, heart
153) Human blood is ________.
153)
A) neutral
B) very basic
C) slightly acidic
D) very acidic
E) slightly basic
154) Which one of the following will cause hemoglobin to release oxygen?
154)
A) increase in pH
B) decrease in pH
C) decrease in temperature
D) decrease in CO 2 concentration
E) increase in O 2 concentration
155) A 25.0 mL sample of a solution of an unknown compound is titrated with a 0.115 M NaOH
155)
solution. The titration curve above was obtained. The unknown compound is ________.
A) a strong acid
B) a strong base
C) a weak acid
D) a weak base
E) neither an acid nor a base
156) A 25.0 mL sample of a solution of a monoprotic acid is titrated with a 0.115 M NaOH solution. The
156)
titration curve above was obtained. The concentration of the monoprotic acid is about ________
mol/L.
A) 25.0
B) 0.0600
C) 0.240
D) 0.120
E) 0.100
23
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