Loose-leaf Version for What Is Life? A Guide to Biology 4E & LaunchPad for What is Life? A Guide to Biology 4E (Twelve Month Access)
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ISBN: 9781319154639
Author: Jay Phelan
Publisher: W.H. Freeman & Co
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Chapter 2, Problem 6MC
Summary Introduction
Introduction:
The concentration of H+ and OH- in a solution determines its pH.
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A buffer system consists of
A. a weak acid and its conjugate base.
B. a weak acid and a proton donor.
C. a weak acid and a proton.
D. a weak base and a proton acceptor.
which of the following is a characteristic of a buffer?
a. The pH will go down significantly when H3O+ is added to the buffer
b. The pH will go down very slightly when H3O+ is added to the buffer
c. The pH will go up significantly when H3O+ is added to the buffer
Which of the following statements is true? a. Acids and bases cannot mix together. b. Acids and bases will neutralize each other. c. Acids, but not bases, can change the pH of a solution. d. Acids donate hydroxide ions (OH–); bases donate hydrogen ions (H+).
Chapter 2 Solutions
Loose-leaf Version for What Is Life? A Guide to Biology 4E & LaunchPad for What is Life? A Guide to Biology 4E (Twelve Month Access)
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- Which of the following solutions has the greatest concentration of hydroxyl ions [OH-]? Select one: a. lemon juice at pH 2 O b. vinegar at pH 3 O c. tomato juice at pH 4 O d. urine at pH 6 e. seawater at pH 8arrow_forwardWhich of the following substances will dissolve in water A.nonpolar B.polar C.hydrophobic D.hydrophilic E.ionicarrow_forwardWhich of the following is FALSE when the concentration of the buffer solution was increased? a. The buffer will be effective in resisting pH changes. b. There will be more weak acid components that can neutralize the added base. c. The solution will have a higher buffer capacity. d. There will be more weak base components that can neutralize the added base.arrow_forward
- two of these statements are truths and one is a lie. Which of the following statements is a lie? a. The concept of pH is exclusive of how buffers work. b. Salts dissociate into ions (except H+ and OH-) when dissolved in water. c. ATP stores a large amount of potential energy.arrow_forwardGlucose dissolves in the water of blood plasma. This mixture is best known as a(n): a. solution. b. suspension. c. aerosol. d. colloid.arrow_forwardAdding HCO3 to a solution will cause the concentration of H* to - and the pH to. Select one: O a. increase; increase O b. increase; decrease O c. decrease; increase O d. decrease; decrease O e. HCO3 has no effect on H* concentrationarrow_forward
- A substance dissociates into K+ and Cl– in solution.The substance is a(n) ________.a. acidb. basec. saltd. bufferarrow_forwardWhich of the following ionizes completely in solution and is considered to be a strong acid? Select one: O a. NAOH O b. HCL O c. NH3 O d. H2CO3 O e. CH3COOHarrow_forwardWhich of the following describes a buffer? A. The measure of the amount of hydrogen ions in a liquid B. A set of chemicals that can keep the pH of a solution stable by alternately donating and accepting the ions that contribute to pH C. A substance that releases hydrogen ions in water D. A substance that accepts hydrogen ions in waterarrow_forward
- Which among the following is an example of a pharmaceutically important buffer system? a. All of the choices b. Sorensen's buffer c. Palitzsch's buffer d. Gifford's bufferarrow_forwardA conjugate acid-base paira. acts as a buffer.b. can combine with H+ in a solution.c. can release H+ to combine with OH−.d. describes carbonic acid (H2CO3) and bicarbonate ions (HCO3−).e. All of these are correct.arrow_forwardHCI is a type of the following: O a. Acid O b. Base O c. Buffer O d. Salt Oe. None of the Abovearrow_forward
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