We’re being asked to determine which of the following is a true statement about aqueous solutions containing a buffer
Recall that a buffer resists change in pH and can be composed of the following:
• weak base and its conjugate acid
• weak acid and its conjugate base
• weak acid and a strong base
▪ concentration of weak acid > concentration of strong base
• weak base and a strong acid
▪ concentration of weak base > concentration of strong acid
Which of the following is a true statement about aqueous solutions containing a buffer?
A. a buffer resists pH change caused by adding acid or base
B. the combination of HNO3/NO3- can be used as a buffer
C. buffer capacity depends only on its total concentration
D. all buffered solutions have a pH = 7
E. none of the above
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