Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Chemistry
Chemistry
Problem
A buffer is to be prepared at pH 8.00 using a weak acid whose
p
K
a
pK_a
p
K
a
is 7.21. What is the required value of the ratio
[
A
−
]
[
H
A
]
\frac{[A^-]}{[HA]}
[
H
A
]
[
A
−
]
? a)
2.2
2.2
2.2
b)
0.16
0.16
0.16
c)
6.2
6.2
6.2
d)
0.79
0.79
0.79
Browse the problem library