What is always a characteristic of a solution that contains a buffer?
A) The solution is neutral and has a pH of 7.
B) The solution contains a small amount of solute dissolved in a large volume of solvent.
C) The solution has been diluted by the addition of solvent.
D) The solution resists large changes in pH when small amounts of acids or bases are added.
E) The solution maintains a constant pH value; no amount of added acid or base can change the pH.
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A)NH2−
B)NH3
C)NH4+
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