Answer:
You can.
Explanation:
If you want you can, but usually as you cover topics you should list the definitions for each topic then instead of all at the beginning you do not want it to seem like it is a lot.
The answer is : Ka=0.000137
HA -> H+ + A-
0.10 x x
0.10-x +x +x
[H+]= 10^-2.44 = 0.00363
x= 0.00363
(0.00363)(0.00363)/(0.10-0.00363) = 0.000137
Ka=0.000137
They work in many different ways?
I would do top to down approach start from the top and work your way down to the bottom.