Problem: Which of the following gives a buffer solution when equal volumes of the two solutions are mixed?(a) 0.10 M HF and 0.10 M NaOH(b) 0.20 M HF and 0.10 M NaOH(c) 0.10 M HCl and 0.20 M NaF(d) 0.10 M HF and 0.10 M NaF

FREE Expert Solution

We’re being asked to determine which of the given solutions is a good buffer system.


Recall that a buffer 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


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Problem Details

Which of the following gives a buffer solution when equal volumes of the two solutions are mixed?

(a) 0.10 M HF and 0.10 M NaOH

(b) 0.20 M HF and 0.10 M NaOH

(c) 0.10 M HCl and 0.20 M NaF

(d) 0.10 M HF and 0.10 M NaF

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