You're right. 2 and 4 are true.
1 is not true.
3. I don't know. It IS determined by the ratio of the base/acid BUT the pKa must be in there somewhere, also. Since pKa is not mentioned I would go with 3 being false.
5 I think is not a good part of the problem. An acid added to a basic buffer (e.g., NH4^+/NH3) does react with the weak base; an acid added to an acidic buffer (acetic acid/acetate) has no weak base in it. So it can be either right or wrong depending upon the kind of buffer in the problem.
Select the statements that correctly describe buffers.?
1) The pH of a buffer solution does not change significantly when any amount of a strong acid is added.
2) The Ka of a buffer does not change when any amount of an acid is added to the buffer solution.
3) The pH of a buffer solution is determined by the ratio of the concentration of conjugate base to the concentration of strong acid.
4) A buffer is generally made up of a weak acid and its conjugate base.
5) An acid added to the buffer solution reacts with the weak base of the buffer.
I think it is 2 and 4. I'm not really sure about the rest...
3 answers
Thank you very much!
2,4, and 5 are correct
1 answer