Which of the following could be a buffer?
A)NaF(aq)
B)HF(aq)+ NaF(aq)
C)HF(aq)+ O(l)
D)NaF(aq)+ O(l)
E)NaCl(aq)+ HF(aq)

Question

Which of the following could be a buffer?
A)NaF(aq) 
B)HF(aq)+ NaF(aq) 
C)HF(aq)+ O(l) 
D)NaF(aq)+ O(l) 
E)NaCl(aq)+ HF(aq)

Quizplus · Accepted Answer

A buffer is a solution that resists a change in pH upon the addition of an acid or a base. The solution must contain a weak acid and its conjugate base or a weak base and its conjugate acid. Option B contains both HF (weak acid) and NaF (conjugate base), making it a buffer solution. Option A contains only NaF, which is not a weak acid or a weak base, so it cannot be a buffer. Option C and D contain only HF and 11eaa640_f820_858e_842f_09b1ed748940_TB6909_11 O, which are not conjugate acid-base pairs so they cannot be a buffer. Finally, option E contains NaCl and HF. NaCl has no acidic or basic properties and HF is a weak acid with no conjugate base present, so the solution cannot be a buffer.

Which of the Following Could Be a Buffer