1
Created by Boundless
Phosphoric acid has three Ka values: 7.25 x 10­3, 6.31 x 10­8, and 4.80 x 10­13.
Which of the following correctly links the Ka value to its associated acid and
conjugate base?
A
6.31 x 10­8, H2PO4­ , HPO42­
B
All of these answers
C
7.25 x 10­3, H3PO4, H2PO4­
D
4.80 x 10­13, HPO42­ , PO43­
2
Created by Boundless
What is the pH of a 0.1 M solution of sulfuric acid (H2SO4)? The pKa for the loss of
the second proton is 1.92.
A
2.92
B
1.00
C
1.46
D
0.87