Match the following conjugate acid-base pairs.

1.            Match the following conjugate acid-base pairs.

 

HCO3?   

 

NH3                                         

 

H2O

 

H2PO4-

 

A.            HPO42-

 

B.            NH4+ 

 

C.            H3O+                       

 

D.            H2CO3          

 

QUESTION 2 What causes respiratory and metabolic acidosis? (Select all that apply.)

 

                hyperventelation

 

                excessive eating

 

                heavy exercise

 

                diabetes

 

                hypoventilation

 

                starvation

 

QUESTION 3 Arrange the following average pH values for several biological materials from the least to the most acidic.

 

gastric content, [H3O+] = 10-2M

 

spinal fluid, [OH-] = 10-6.6 M

 

milk, pH 7.1

 

saliva, pH = 7.0

 

urine, pH = 6.6

 

QUESTION 4       Match the following terms with their definitions.

 

acid

 

base

 

acid-base balance

 

pH

 

acidosis

 

alkalosis

 

buffers

 

A.            Hydrogen ion sponges- can bind with or release H+ thus maintaining pH of the solution

 

B.            blood pH > 7.45 H+↓

 

C.            blood pH < 7.35;  H+ ↑

 

D.            stable concentration of H+ ions in body fluids

 

E.            a substance which donates (or releases) H+ ions (when dissolved in H2O)

 

F.            a substance which accepts (or combines with) H+ ions (in solution)

 

G.           negative logarithm of H+ concentration (hydronium ions H3O+)

 

QUESTION 5       The lungs help regulate hydrogen ion concentration by retaining or eliminating which of the following?

 

a.            CO2

 

b.            O2

 

c.             HCO31-

 

d.            H+

 

QUESTION 6       In the body, if the bicarbonate level is high, the respiratory center compensates by decreasing the rate and depth of respiration.

 

  True

 

  False

 

QUESTION 7       A solution that has a pH of 2 is ______ times more _________ than a solution with a pH of 8.

 

                6, acidic

 

                106, acidic

 

                106, basic

 

                6, basic

 

QUESTION 8       What is the conjugate acid of HPO42- ?

 

                H2PO4-

 

                HPO4-

 

                PO43-

 

                H3PO4

 

QUESTION 9.      Nitric acid is a strong acid and dissociates completely when dissolved in water.

 

  True

 

  False

 

QUESTION 10.   Which statement concerning the relative strength of acids is FALSE?

 

a.            Strong acids are good proton donors; weak acids are poor proton donors.

 

b.            A strong acid produces more hydronium ions in water than a weak acid of the same concentration.

 

c.             Strong acids produce strong conjugate bases; weak acids produce weak conjugate bases.

 

d.            A strong acid completely transfers its protons to water; a weak acid only partially transfers its protons to water.

 

e.            Strong and weak acids differ in their extent of proton transfer to water.

 

QUESTION 11     Most acids are weak acids.

 

  True

 

  False

 

QUESTION 12     Consider two acids, A and B. If acid A is weaker than acid B, then acid B dissociates in water to a greater extent than acid A.

 

  True

 

  False

 

QUESTION 13     Consider two acids, A and B.  If acid A is stronger than acid B, then the conjugate base of B is stronger than the conjugate base of A.

 

  True

 

  False