Microbiology with Diseases by Body System (5th Edition)
5th Edition
ISBN: 9780134477206
Author: Robert W. Bauman Ph.D.
Publisher: PEARSON
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Textbook Question
Chapter 2, Problem 8MC
Which of the following statements about a carbonated cola beverage with a pH of 2.9 is true?
- a. It has a relatively high concentration of hydrogen ions.
- b. It has a relatively low concentration of hydrogen ions.
- c. It has equal amounts of hydroxyl and hydrogen ions.
- d. Cola is a buffered solution.
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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
Mark the following statements as true or false. If a statement is false, correct it to make a true statement. a. Acids dissociate in water to give hydrogen ions and an anion. b. Bases are defined as hydrogen ion donors. c. As a solution’s pH rises, it becomes more acidic. d. A buffer is a system of chemicals that resists a change in pH. e. A solution with a pH of 10 has more hydrogen ions than a solution with a pH of 2.
Chapter 2 Solutions
Microbiology with Diseases by Body System (5th 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 - Raw Oysters and Antacids: A Deadly Mix? The highly...Ch. 2 - Why do the cell membranes of microbes living in...Ch. 2 - Prob. 1MCCh. 2 - The atomic mass of an atom most closely...Ch. 2 - One isotope of iodine differs from another in...Ch. 2 - Prob. 4MC
Ch. 2 - Which of the following terms most correctly...Ch. 2 - In water, cations and anions of salts dissociate...Ch. 2 - Prob. 7MCCh. 2 - Which of the following statements about a...Ch. 2 - Proteins are polymers of ___________. a. amino...Ch. 2 - Which of the following are hydrophobic organic...Ch. 2 - Fill in the Blanks 1. The outermost electron shell...Ch. 2 - Fill in the Blanks 2. The type of chemical bond...Ch. 2 - Prob. 3FIBCh. 2 - Prob. 4FIBCh. 2 - Fill in the Blanks 5. Groups of atoms such as NH2...Ch. 2 - Fill in the Blanks 6. The reverse of dehydration...Ch. 2 - Fill in the Blanks 7. Reactions that release...Ch. 2 - Fill in the Blanks 8. All chemical reactions begin...Ch. 2 - Fill in the Blanks 9. The ____________ scale is a...Ch. 2 - Prob. 10FIBCh. 2 - Label a portion of the molecule below; label two...Ch. 2 - Shown is the amino acid tryptophan. Put the letter...Ch. 2 - List three main types of chemical bonds, and give...Ch. 2 - Name five properties of water that are vital to...Ch. 2 - Prob. 3SACh. 2 - What is the difference between atomic oxygen and...Ch. 2 - Explain how the polarity of water molecules makes...Ch. 2 - Prob. 1CTCh. 2 - Prob. 2CTCh. 2 - Two freshmen disagree about an aspect of...Ch. 2 - When an egg white is heated, it changes from...Ch. 2 - Prob. 5CTCh. 2 - The poison glands of many bees and wasps contain...Ch. 2 - Prob. 7CTCh. 2 - Prob. 8CTCh. 2 - The deadly poison hydrogen cyanide has the...Ch. 2 - Triple covalent bonds are stronger and more...Ch. 2 - How can hydrogen bonding between water molecules...Ch. 2 - How can a single molecule of magnesium hydroxide...Ch. 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_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_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_forward
- When 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_forwardIn the human body,the -log of the hydrogen ion concentration ([H+]) is regulated by a. pH b. Acidity c.Alkalinity d.Bicarbonate ion e. Buffer systemarrow_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
- Which 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_forwardWhich 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_forward
- The fluid with the lowest [H+] concentration A. Saliva (pH = 6.40) B. Lung fluid (pH = 7.60) C. Tears (pH = 7.40) D. Urine (pH = 6.80)arrow_forwardA pH of 3 is a. basic b. neutral c. acidicd. a bufferarrow_forwardWhich 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_forward
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