Acids and Bases practice questions

Question 1

ATI study manual page 248 question 5

Question 2

Bases are proton acceptors but also can be known as OH- what?

Answer 2

DONORS

Question 3

How do biological buffers resist pH change?

Answer 3

• short answer: absorb ions from introduced acids or base
• long answer: buffers able to resist pH changes when small amnts of acids or bases are added. Most buffers are made of a weak acid and weak base ie. blood buffer = weak carbonic acid (H2CO3) and a weak bicarb (HCO3-). carbonic acid dissociates to a small extent to produce bicarb ions that can bind up H+ ions to reform the weak carbonic acid and reduce H+ in sln and keep blood pH in ideal range of 7.35-7.45

Question 4

What is ALWAYS the product of a neutralization rxn?

Answer 4

salt (cation from base and anion from acid) and water

Question 5

H+ concentration difference when you go from pH of 4 to 6?

Answer 5

10x10 = 100x less
* pH scale is log, a change of one pH unit = 10x change in H+ concentration

Question 6

H+ concentration difference from pH 6 to 4?

Answer 6

10x10 = 100
* 100 x more