15b

Question 1

when will a cation not affect the pH?

Answer 1

when it’s part of a strong base

Question 2

KaKb=

Answer 2

Kw

Question 3

KaKb=…

Answer 3

1x10^-14

Question 4

the lower the pKa

Answer 4

the stronger the acid

Question 5

pH buffer

Answer 5

solution of a weak acid and its conjugate base

Question 6

why is pH buffer good?

Answer 6

resistant to pH changes

Question 7

buffer range

Answer 7

pH range within which a given buffer can provide pH protection

Question 8

what is the buffer range?

Answer 8

pKa+-1

Question 9

to make a buffer

Answer 9

1. pick an acid who pKa is the pH you want +-1

2. determine the base to acid ratio you need to get the target pH

Question 10

buffer capacity

Answer 10

quantity of acid/base that a buffer can neutralize while maintaining pH pithing desired range

Question 11

pH indicators

Answer 11

water-soluble, weak organic acids, that change color as the pH changes

Question 12

buffer is usually a solution of…

Answer 12

a weak acid and its conjugate base

Question 13

what does a decrease in H+ ions mean

Answer 13

a raise in the pH and a shift to the left

Question 14

when can you apply the common-ion affect

Answer 14

any equilibrium involving a weak acid and its conjugate base