What effect does dilution have on an acid?

Answer 1

The pH of the weak acids is lower than 7 (neutral) but higher than strong acids (which can be around 1). This is because pH is a measure of hydrogen ion concentration and weak acids only partially dissociate. It is a logarithmic scale, so pH=-log[H]+ so a larger concentration of hydrogen means a lower pH and a smaller concentration, a higher pH. Thus, when water is added to a weak acid, the concentration of hydrogen ions will decrease and the pH will become greater.

Answer 2

If an equilibrium mixture is diluted, the concentration of the acid will seem to be less. This will increase the value of Kc (the equilibrium constant).

For weak acids, Kc is given the symbol Ka, and called the acid dissociation constant. I would therefore presume that Ka will be affected the came way as Kc (i.e. increased).

Answer 3

When dealing with PH buffers, anything you add to the solution can change the PH of the solution. If it was more specific I could tell you exactly why, what are you diluting the buffer with? do you have a PH meter to see the actuality of what your doing? or trying to do? What is your Buffer solution?

Answer 4

The acid would not favor dissociation as the solution already has H+ ions. Its a equilibrium.

Answer 5

It reduces the strength of the acid by increasing the pH

Answer 6

The pH of an acidic solution goes up when it is diluted, and it would approach a pH of 7.

Answer 7

When an acid is dilute the pH rises, approaching 7.

Answer 8

If you dilute an acid, the solution becomes less acidic which would be measured as an increase in pH (such as, from 3 to 4).

Answer 9

Dilution of any acid will decrease the concentration of H+ and thus will increase the pH. The magnitude of the effect on a weak acid will depend on the Ka of that acid.

Answer 10

Neha