Biology: The Unity and Diversity of Life
15th Edition
ISBN: 9780357093795
Author: STARR
Publisher: CENGAGE LEARNING (CUSTOM)
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Chapter 2, Problem 12SQ
Summary Introduction
Introduction: When a hydrogen atom gains or losses an electron, the hydrogen ions (H+) are formed. It is present in the nucleus of the hydrogen atom.
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Hydrogen ions (H+) are ________ .a. in blood c. indicated by a pH scaleb. protons d. all of the above
Acids are substances that ________.
a.
release hydrogen ions
b.
absorb hydrogen ions
c.
absorb hydroxide ions
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
Chapter 2 Solutions
Biology: The Unity and Diversity of Life
Ch. 2 - Mercury Emissions by Continent By weight, coal...Ch. 2 - Mercury Emissions by Continent By weight, coal...Ch. 2 - Mercury Emissions by Continent By weight, coal...Ch. 2 - Mercury Emissions by Continent By weight, coal...Ch. 2 - What atom has only one proton? a. hydrogen b. an...Ch. 2 - A molecule into which a radioisotope has been...Ch. 2 - Prob. 3SQCh. 2 - Prob. 4SQCh. 2 - All ions have at least one ________ (select all...Ch. 2 - Rank the following chemical bonds in order of...
Ch. 2 - The measure of an atoms ability to pull electrons...Ch. 2 - The mutual attraction of opposite charges holds...Ch. 2 - Atoms share electrons unequally in a(n) ________...Ch. 2 - A(n) ________ substance repels water. a. acidic b....Ch. 2 - Prob. 11SQCh. 2 - Prob. 12SQCh. 2 - When dissolved in water, a(n) ________ donates H+;...Ch. 2 - A ________ can help keep the pH of a solution...Ch. 2 - Prob. 15SQCh. 2 - Match the terms with their most suitable...Ch. 2 - Alchemists were medieval scholars and philosophers...Ch. 2 - Draw a shell model of a lithium atom (Li), which...Ch. 2 - Polonium is a rare element with 33 radioisotopes....Ch. 2 - Some undiluted acids are not as corrosive as when...
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- The pH of lemon juice is about 2.0, whereas tomato juice’s pH is about 4.0. Approximately how much of an increase in hydrogen ion concentration is there between tomato juice and lemon juice? a. 2 times b. 10 times c. 100 times d. 1000 timesarrow_forwardA 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_forward
- All ions have at least one ________ select all that are correct. a. proton c. electron b. neutron d. all of the abovearrow_forwardWhich of the following statements is not true? a. Water is polar. b. Water stabilizes temperature. c. Water is essential for life. d. Water is the most abundant atom in Earth’s atmosphere.arrow_forwardtwo 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_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_forwardWhich of the following alters proteins and membranes? a. Alcohols b. Iodine c. All other choices d. Phenolic compoundsarrow_forwardA solution with a pH of 2 has a hydrogen ion concentration that is _______________ the hydrogen ion concentration of a solution with a pH of 4. (a) 1/2 (b) 1/100 (c) 2 times (d) 10 times (e) 100 timesarrow_forward
- The hydrogen ion contained in hydrochloric acid comes from ... a) ... pyruvic acid. b) ... carbon dioxide. c) ... citric acid. d) ... lactic acid. e) ... nucleic acid.arrow_forwardWhich of the following are properties of water that make itimportant for living cells?(a) It is a polar molecule that can form solutions.(b) It has high surface tension.(c) It has a high specific heat.(d) It can participate in dehydration and hydrolysisreactions.(e) All of the above.arrow_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
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