Question

What is [H+] concentration in a 4M aq solution of acetic acid (Ka= 1.8 E-5)?

what formula do you use to get the answer?

Answer 1

Set up an ICE chart, substitute into the Ka expression, and solve for the unknown.

Answer 2

could you remind me what an ICE chart is?

Answer 3

If we call acetic acid, HAc, then
................HAc ==> H^+ + Ac^-
initial(I).......4.......0......0
change(C).......-x......x.......x
equil(E).........4-x.....x.......x

Ka = (H^+)(Ac^-)/(HAc)
1.8E-5 = (x)(x)/(4.0-x)
Solve for x = (H^+).

Answer 4

thank you!