Question

A 350.0 mL buffer solution is 0.150 M in HE and 0.150 M in NaF. If the same volume of another
buffer is 0.350 M in HE and 0.350 M in NaF is taken. Then, difference masses of NaOH could be
added to these buffers before the pH of both buffers rise just above 4.00?(
K, of HF = 3.5 x 10-4)
(A) 2.5 g
(B)
1.5 g
(C) 0.5 g
(D) 4.5 g​

Answer 1

Answer:

C. 0.5 g is the answer

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