Acids, Bases, and Buffers Flashcards Preview

M2M Unit III > Acids, Bases, and Buffers > Flashcards

Flashcards in Acids, Bases, and Buffers Deck (28):
1

Effective buffering occurs in the range from ____ or within ____ on either side of the pKa.

0.1 to 10; one pH unit

1

The bicarbonate buffer system is effective ____ units above its pKa.

1.3

2

What does Helicobacter pylori do?

causes gastric ulcers

2

A ____ is a mixture of a weak acid (HA) and its conjugate base (A).

buffer

2

The bicarbonate buffer system is the most important regulator of extracellular ___.

pH

2

The _________ is OPEN, modulated by regulation of CO2 loss in the ____ and H+ /HCO3- excretion in the _____.

bicarbonate buffer system; lung; kidney

3

The _____ the pKa, the stronger the base.

higher

4

The bicarbonate buffer system is effective 1.3 units ____ its ____.

above; pKa

5

Effective _____occurs in the range from 0.1 to 10 or within one pH unit on either side of the ____.

buffering; pKa

6

What is the causative agent of gastric ulcers?

Helicobacter pylori

7

The bicarbonate buffer system is OPEN, modulated by regulation of CO2 loss in the lung and _____ excretion in the kidney.

H+ /HCO3-

8

memorize this bicarb equation

pH = 6.1 + log 20 = 7.4

9

A buffer is a mixture of a ____ and _____.

weak acid (HA); its conjugate base (A)

9

The bicarbonate buffer system is ____, modulated by regulation of ____ in the lung and H+ /HCO3- excretion in the kidney.

open; CO2 loss

11

pH = pKa + log([proton acceptor]/[proton donor])

the Henderson-Hasselbach equation

12

The _____ is the most important regulator of extracellular pH.

bicarbonate buffer system

14

The higher the pKa, the _____ the base.

stronger

16

The _____ the pKa, the stronger the acid.

lower

17

pH = 6.1 + log 20 = 7.4

memorize this bicarb equation

19

The lower the pKa, the _____ the acid.

stronger

20

The modified H-H equation for the bicarbonate system is?

pH = 6.1 + log [HCO3-]mM/ .03Pco2mmHg

21

What is the Henderson-Hasselbach equation?

pH = pKa + log([proton acceptor]/[proton donor])

22

How does Helicobacter pylori cause gastric ulcers?

by using urease to create a neutral pH environment

23

The higher the ____, the stronger the base.

pKa

24

____ acids and bases are reversibly protonated and deprotonated.

Weak

26

Weak acids and bases are _____ and deprotonated.

reversibly protonated

27

The _____ is effective 1.3 units above its pKa.

bicarbonate buffer system

28

The lower the ____, the stronger the acid.

pKa