THANK YOU CHEM_tr
thanks soooooooooooooooooooooooo much for your help
you are not ruining my education
I don't have a lot of support here at the school I am attending at the only tutor is a bit "special " i mean slow.
thanks again
thank chem_tr I have one more question :
Solve the quadratic equation for the more general case where the total concentration of acid is:
a. ((Ao = (HA) + (A-) ) has any value Ao.
b. One can avoid solution of the quadratic equation by using a method of successive approximations...