Which branch of biology is concerned with the naming and classifying of organisms?
taxonomy
What gives rise to the cohesiveness of water molecules?
hydrogen bonds
Assume that acid rain has lowered the pH of a particular lake to pH 4.0. What is the hydroxide ion concentration of this lake?
this question is looking for the concentration of OH- (Hydroxide)
the H+ balance is 10^-4 so the OH- must add up to 14. So the concentration would be 10^-10
What is the pH of a solution with a hydroxide ion, [OH-], concentration of 10-12 M?
this is another one of those "must be 14" questions. ph 2 = 10^-2.
2=12=14
Early 19th-century scientists believed that living organisms differed from nonliving things as a result of possessing a "life force" that could create organic molecules from inorganic matter. The term given to this belief is
vitalism
What is the pH of a solution with a proton, [H+], concentration of 10-8 M?
Answer
pH 8
Which of the following solutions has the greatest concentration of protons, [H+]?
gastric juice at pH 2 (this is simple because the lower the pH the higher the acid level)
Different atomic forms of an element contain the same number of protons but a different number of neutrons. What are these different atomic forms called?
isotopes
Which of the following statements is true about buffer solutions?
Answer
They maintain a relatively constant pH when either acids or bases are added to them.
Amino acids are acids because they always possess which functional group?
