BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
10th Edition
ISBN: 9781305967359
Author: STARR
Publisher: CENGAGE L
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Chapter 2, Problem 14SA
Summary Introduction
Introduction:
A solvent is defined as a liquid that dissolves a solid, liquid or gaseous solute. A solute is a substance that gets dissolved. Solute and solvent together make up a solution. Solute is generally present in smaller amount than the solvent.
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in a solution, the solvent is:
A) always a gas
B) always water
C) the substance that is dissovled
D) the substance in the Greatest amount
Which is NOT an appropriate factor in choosing solvents in a mixed solvent system?
a.
The two solvents must be inert.
b.
The two solvents must be immiscible.
c.
The solute must have varying solubility between the two solvents
d.
The solute must not react with the solvents
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 land
Chapter 2 Solutions
BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
Ch. 2 - What atom has only one proton? a. hydrogen c. a...Ch. 2 - A molecule into which a radioisotope has been...Ch. 2 - Prob. 3SACh. 2 - Prob. 4SACh. 2 - All ions have at least one ________ select all...Ch. 2 - Rank the following chemical bonds in order of...Ch. 2 - The mutual attraction of opposite charges holds...Ch. 2 - Atoms share electrons unequally in an _______...Ch. 2 - An _________ substance repels water. a. acidic c....Ch. 2 - A salt does not release ______ in water. a. ions...
Ch. 2 - Hydrogen ions H+ are _____. a. in blood c....Ch. 2 - When dissolved in water, an _________ donates H+;...Ch. 2 - An ________ can help keep the pH of a solution...Ch. 2 - Prob. 14SACh. 2 - Prob. 15SACh. 2 - Alchemists were the forerunners of modern-day...Ch. 2 - Draw a shell model of a lithium atom Li, which has...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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- Which 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_forwardAn _________ substance repels water. a. acidic c. hydrophobic b. basic d. polararrow_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_forward
- A substance that has weight and occupies space is calleda. kinetic energy.b. a catalyst.c. matter.d. potential energy.arrow_forwardMobile phase can be : A) Solid or liquid B) Only solid C) Only gas D) Liquid or gasarrow_forwardWhich of the following alters proteins and membranes? a. Alcohols b. Iodine c. All other choices d. Phenolic compoundsarrow_forward
- Acids are substances that ________. a. release hydrogen ions b. absorb hydrogen ions c. absorb hydroxide ionsarrow_forwardElectrolytes that release hydrogen ions in water are Group of answer choices A) bases. B) nucleotides. C) acids. D) electrons.arrow_forwardYou might have noticed that in space exploration, attention is often focused on the presence or absence of water on other planets. What characteristics of water make it as essential for life as we know it on Earth?arrow_forward
- This 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_forwardWhich 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_forwardWhy is water considered the universal solvent? A:Water molecules are weakly bonded to other water molecules. B:Water is a polar compound because its ends have opposite charges. .C:Water molecules are held together by covalent bonds. D:Water dissolves more substances than any other solvent.arrow_forward
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