Question

buffers work best when... the ph is nearly neutral. nearly all of the buffer molecules are dissociated. the ratio of h+ to oh- is close to 1.0. about half of the buffer molecules are dissociated. nearly all of the buffer molecules are undissociated. submit request answer part d how does the way a buffer stabilizes ph during addition of acid differ from the way the same buffer stabilizes ph during addition of base? the same buffer cant work for both acid and base. in one case the buffer is strong; in the other case its weak. its the same reaction running backward or forward. in one case it adds h+; in the other case it adds oh-.

Explanation:

Buffers are most effective when about half of the buffer molecules are dissociated as this allows them to most efficiently resist changes in pH upon addition of acid or base. When an acid is added to a buffer, the conjugate - base component of the buffer reacts with the added H⁺. When a base is added, the conjugate - acid component of the buffer reacts with the added OH⁻. These are essentially the forward and reverse of the same equilibrium reaction.

Answer:

For the first question: about half of the buffer molecules are dissociated.
For the second question: It's the same reaction running backward or forward.