Exam 2 Chapter 5 Post

Question 1

We call a molecule that binds up excess hydrogen ions in a solution a(n) ________.

Answer 1

base

Question 2

Which of the following equations is the carbonic acid blood buffer system?

Answer 2

CO2+H2O -> H2CO3 -> H+ + HCO3-

Question 3

When acids are added to a solution, the pH should ________.

Answer 3

decrease

Question 4

Which property of water allows some insects walk on water?

Answer 4

surface tension

Question 5

Label the pH scale with the correct ph terms for labels A, B, and C.

A pH 0-3
B pH 7
C pH 8-14

Answer 5

A Acid
B Neutral
C Base

Question 6

How do buffers maintain a relatively constant pH?

Answer 6

They remove H+ from a solution when an acid is added

Question 7

Why does ice float in liquid water?

Answer 7

Hydrogen bonds stabilize and keep the molecules of ice farther apart than the molecules of liquid water

Question 8

In cells, the flow of information is from _______ to ___________ to ______________

Answer 8

DNA to RNA to Protein

Question 9

Which of the following introduces new variation into a population?

Answer 9

Mutation

Question 10

If you were to add a large amount of H2SO4 to water, the pH of the solution would:

H2SO4 ↔︎ H+ + HSO4-

Answer 10

decrease

Question 11

A substance that has many polar covalent bonds will be

Answer 11

hydrophilic