Microbiology With Diseases By Taxonomy (6th Edition)
6th Edition
ISBN: 9780134832302
Author: Robert W. Bauman Ph.D.
Publisher: PEARSON
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Question
Chapter 2, Problem 8MC
Summary Introduction
Introduction:
A substance which can “dissociate into one or more
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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 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 8
Which 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.
Chapter 2 Solutions
Microbiology With Diseases By Taxonomy (6th Edition)
Ch. 2 - Electrons zip around the nucleus at about 5...Ch. 2 - Chlorine and potassium atoms form ionic bonds,...Ch. 2 - Why are decomposition reactions exothermic, that...Ch. 2 - Why does the neutralization of an acid by a base...Ch. 2 - Prob. 5TMWCh. 2 - Prob. 1CCSCh. 2 - Prob. 1MCCh. 2 - Prob. 2MCCh. 2 - Prob. 3MCCh. 2 - Prob. 4MC
Ch. 2 - Which of the following terms most correctly...Ch. 2 - Prob. 6MCCh. 2 - Prob. 7MCCh. 2 - Prob. 8MCCh. 2 - Prob. 9MCCh. 2 - Prob. 10MCCh. 2 - Prob. 1FIBCh. 2 - Prob. 2FIBCh. 2 - Prob. 3FIBCh. 2 - Prob. 4FIBCh. 2 - Prob. 5FIBCh. 2 - Prob. 6FIBCh. 2 - Reactions that release energy are called...Ch. 2 - Prob. 8FIBCh. 2 - Prob. 9FIBCh. 2 - Prob. 10FIBCh. 2 - Prob. 1VICh. 2 - Prob. 2VICh. 2 - Prob. 1SACh. 2 - Prob. 2SACh. 2 - Prob. 3SACh. 2 - Prob. 4SACh. 2 - Prob. 5SACh. 2 - Prob. 1CTCh. 2 - Prob. 2CTCh. 2 - Prob. 3CTCh. 2 - Prob. 4CTCh. 2 - Prob. 5CTCh. 2 - Prob. 6CTCh. 2 - Prob. 7CTCh. 2 - Prob. 8CTCh. 2 - Prob. 9CTCh. 2 - Prob. 10CTCh. 2 - Prob. 11CTCh. 2 - Prob. 12CTCh. 2 - Prob. 13CTCh. 2 - Prob. 14CTCh. 2 - A textbook states that only five nucleotide bases...Ch. 2 - Using the following terms, fill in the following...
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- Using a pH meter, you find the pH of an unknown solution to be 8.0. How would you describe this solution? a. weakly acidic b. strongly acidic c. weakly basic d. strongly basicarrow_forwardConsider a solution which is 0.10 M in CH3COOH and 0.20 M in NaCH3coo. Which of the following statements is TRUE? A. If a small amount of NaOH is added, the pH decreases very slightly. B. If NaOH is added, the OH- ions react with the CH3CO0 ions. C. If a small amount of HCl is added, the pH decreases very slightly. D. If HCI is added, the H* ions react with CH3COOH ions. E. If more CH3COOH is added, the pH increases.arrow_forwardWhen some of the sugar added to iced tea remains undissolved on the bottom of the glass, the solution can be described as A. dilute В. polar C. nonpolar D. saturated E. unsaturatedarrow_forward
- Adding 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_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_forwardThere are two solutions with different pH levels. Solution A is neutral, with a pH of 7. Solution B is slightly alkaline, with a pH above 7. Two beakers are filled with of each solution (one for each solution). A phosphate buffer was added to it and CO2 was blown into it until there was a change of color meaning a change in pH. (this experiment is to see how the CO2 from the lungs can cause a pH change in water) Why does it take so long for the solutions to change color? Relate your answer to the equation (H2O + CO2 ⇌ H2CO3 ⇌ HCO3- + H+ ) and to the presence of the buffer.arrow_forward
- Which of the following materials will have the greatest effect on colligative properties of a solution? a. CH3CI b. NaCl c. (NH4)2SO4 d. CH3CH2OH O A O Darrow_forwardA pH of 3 is a. basic b. neutral c. acidicd. a bufferarrow_forwardSubstances those are partially dissolved in water are commonly known as اخترأحد الخيارات a. hydrophilic / hydrophobic b. false statement c. hydrophilic d. hydrophobic e. all given choices are incorrectarrow_forward
- Which of the following liquid substances exhibit the highest viscosity at 25 ºC? A. H3C−(CH2)4−CH2OH (hexanol) B. H3C−(CH2)3−CH2OH (pentanol) C. H3C−(CH2)4−COOH (hexanoic acid) D. All of the above have equal viscosities.arrow_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_forwardImagine that you have a jar of syrup A and a plastic Ziploc bag of syrup B. You poke tiny holes in the bag and put it inside the jar. Where will water move? Hint: remember that water moves from the more watery area (high concentration of water) to the less watery area (low concentration of water). Water moves from the bag (B) to the jar (A) Water moves from the jar (A) to the bag (B)arrow_forward
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