DAT Destroyer Gen Chem 167

[Demo0710]

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The question is as follows:

A solution of NaOH and HF are titrated to the endpoint of a titration. The final solution will contain?

A. Na+ and F-
B. H2O, H+, OH-, HF, Na+, F-
C. H2O, F-, Na+
D. Na+, F-, NaOH
E. NaOH and HF in a 1:1 ratio

The correct answer is B. Can someone explain why NaOH would also not be present at the end?

 

[njdoc327]

NaOH is a strong base so it will dissociate completely. HF on the other hand is a weak acid which is why you see HF in the final solution. You also see some F- because some of it will dissociate but not a lot. hope that helps