[kapital]

If we have a solution of 1000 molecules and 42 of them is reacted with water(protolyisis).   And if we then add a 1000 of molecules(?) od NaOH, is then the number of aceitic molecules that reacts with water going to change or not?

[Borek]

Think what you have in solution after adding 1000 molecules of NaOH to 1000 molecules of acetic acid.

[kapital]

Salt sodium acetate and water and x-moleculs of non-disociated acetic acid?

[Borek]

Where does the undissociated acid come from?

[kapital]

I dont now. Does it disociate 100% when the base is added?

[Borek]

When the base is added it gets neutralized - so there should be no acetic acid at all.

In reality some of the acetate anions react with water - they are a weak base - yielding OH^-and acetic acid. But basically you have no acetic acid in the solution, so it can't react with water.

[kapital]

Why is then pH basic?

[Borek]

Why is then pH basic?

some of the acetate anions react with water - they are a weak base - yielding OH^-