Part 4

Question 1

______ release H⁺ and are therefore proton donors.

Answer 1

Acids release H+ and are therefore proton donors.

Question 2

_____ release OH^- and are proton acceptors.

Answer 2

Bases release OH- and are proton acceptors.

Question 3

Acids release H⁺ and are therefore proton ______.

Answer 3

Acids release H+ and are therefore proton donors.

Question 4

Bases release OH^- and are proton ______.

Answer 4

Bases release OH-​ and are proton acceptors.

Question 5

______ solutions have higher H⁺ concentrations and therefore a _____ pH.

Answer 5

Acidic solutions have higher H⁺ concentrations and therefore a lower pH.

Question 6

_____ solutions have lower H⁺ concentration and therefore a _____ pH.

Answer 6

Alkaline / Basic solutions have lower H⁺ concentration and therefore a higher pH.

Question 7

______ solutions have equal H⁺ and OH^- concentrations.

Answer 7

Neutral solutions have equal H+ and OH- concentrations.

Question 8

Acidic: pH _____

Basic: pH _____

Neutral: pH _____

Answer 8

Acidic: pH 0 - 6.99

Basic: pH 7.01 - 14

Neutral: pH 7.00

Question 9

What system is the biological buffer that resists changes in pH in our blood?

Answer 9

carbonic acid - bicarbonate system

Carbonic acid dissociates, reversibly releasing bicarbonate ions and protons.

The chemical equilibrium between carbonic acid and bicarbonate resists pH changes in the blood.

Question 10

What are the four molecules unique to living systems that contain carbon and hence are organic compounds?

Answer 10

1. ) carbohydrates
2. ) lipids
3. ) proteins
4. ) nucleic acids

Question 11

What is the major function of carbohydrates?

Answer 11

to supply a source of cellular food