Biology Today and Tomorrow without Physiology (MindTap Course List)
5th Edition
ISBN: 9781305117396
Author: Cecie Starr, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Textbook Question
Chapter 2, Problem 6SQ
When dissolved in water, a(n) _____ donates H+ and a(n) ______ accepts H+.
- a. acid; base
- b. base; acid
- c. buffer; solute
- d. base; buffer
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Which 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 water
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.
Select the statements that are TRUE regarding Water. SELECT ALL THAT APPLY
A. Water is amphoteric
B. Water can be a base
C. Water is partially charged
D. Water can be an acid
Chapter 2 Solutions
Biology Today and Tomorrow without Physiology (MindTap Course List)
Ch. 2 - A. The first shell corresponds to the first energy...Ch. 2 - B. A chlorine atom (Cl) becomes a negatively...Ch. 2 - Figure 2.12 A pH scale. Here, red dots signify...Ch. 2 - Figure 2.17 Fatty acids. Double bonds in the tails...Ch. 2 - Effects of Dietary Fats on Lipoprotein Levels...Ch. 2 - Effects of Dietary Fats on Lipoprotein Levels...Ch. 2 - Effects of Dietary Fats on Lipoprotein Levels...Ch. 2 - Prob. 1SQCh. 2 - Which element has only one proton?Ch. 2 - The mutual attraction of opposite charges holds...
Ch. 2 - A salt does not release __________ in water. a....Ch. 2 - A(n) _______ substance repels water. a. acidic b....Ch. 2 - When dissolved in water, a(n) _____ donates H+ and...Ch. 2 - _________ is a monosaccharide. a. Glucose b....Ch. 2 - Unlike saturated fatty acids, the tails of...Ch. 2 - Which of the following is a class of molecules...Ch. 2 - Prob. 10SQCh. 2 - Prob. 11SQCh. 2 - Prob. 12SQCh. 2 - Prob. 13SQCh. 2 - Match the molecules with the best description.Ch. 2 - Match each molecule with its component(s).Ch. 2 - Alchemists were the forerunners of modern-day...Ch. 2 - Prob. 2CTCh. 2 - Polonium is a rare element with 33 radioisotopes....Ch. 2 - In the following list, identify the carbohydrate,...
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- A salt does not release ______ in water. a. ions b. H+arrow_forwardManufacturers make carbonated drinks by forcing pressurized carbon dioxide gas into flavored water. A chemical reaction between water molecules and some of the CO2 molecules creates hydrogen ions (H+) and bicarbonate, which is a buffer. In your opinion, is this reaction likely to raise the pH of a soda above 7, or lower it? Give your reasoning.arrow_forwardUsing 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_forward
- When dissolved in water, an _________ donates H+; an ________ accepts H+. a. acid; base c. buffer; solute b. base; acid d. base; bufferarrow_forwardAn _________ substance repels water. a. acidic c. hydrophobic b. basic d. polararrow_forwardIn the picture below, both persons carry the same mass of rock salt to be dissolved in the same volume of water. Which of the following statements below is true? a. The rock salt of person A will dissolve slower because of the larger surface area. b. The rock salt of person B will dissolve faster because of the smaller surface area. c. The rock salt of person B will dissolve faster though the surface area of the salt is the same with that of person A. d. The rock salt of person A will dissolve slower because it does not have a larger surface area than in B.arrow_forward
- Which of the following would be most effective as a buffer? A. pure water B. a mixture of molecules that are bonded to each other with hydrogen bonds C. a mixture of unbonded atoms D. a mixture of molecules with ionic bonds that will break apart into ions E. a mixture of nonpolar moleculesarrow_forwardwhich 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 bufferarrow_forwardAcids are substances that ________. a. release hydrogen ions b. absorb hydrogen ions c. absorb hydroxide ionsarrow_forward
- As water is chilled, its molecules slow their movement, and H-bonds form and hold water molecules further apart. This explains why.... a. Water is most dense just above freezing b. Ice floats c. Water molecules dissociate only a small amount d. Why living near a lake moderates temperatures on landarrow_forwardA 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.arrow_forwardThis occurs when the cations and anions are attracted to the positive and negative ends of water molecules: A. ionic bonding B. dissociation C. covalent bonding D. hydrogen bondingarrow_forward
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