Asked by rebekah
I need help with this question, I don't know how to set up the formula to work it out?
Calculate the dissociation constant of a weak monoprotic acid if a 0.08 M solution of this acid gives a hydrogen-ion concentration of 0.0001 M?
Calculate the dissociation constant of a weak monoprotic acid if a 0.08 M solution of this acid gives a hydrogen-ion concentration of 0.0001 M?
Answers
Answered by
DrBob222
Weak monoprotic acid is HA
..........HA --> H^+ + A^-
I.......0.08.....0.....0
C........-x......x.....x
E......0.08-x....x.....x
Substitute the E line into the Ka expression. The problem tells you that x = 1E-4. You may need to solve the quadratic; i.e., you may not be able to assume 0.08-x = 0.08
Post your work if you get stuck.
..........HA --> H^+ + A^-
I.......0.08.....0.....0
C........-x......x.....x
E......0.08-x....x.....x
Substitute the E line into the Ka expression. The problem tells you that x = 1E-4. You may need to solve the quadratic; i.e., you may not be able to assume 0.08-x = 0.08
Post your work if you get stuck.
Answered by
rebekah
I'm confused??
Answered by
DrBob222
That doesn't help me. What are you confused about. In detail. Show your work as far as you can get and explain what you don't understand about the next step.
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