How to Determine the Ratio of HX to X- in Solution B?

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I am a little stuck on this question :

Solution A contains n moles of a weak acid HX. The addition of some sodium hydroxide to A neutralises one third of the HX present to produce Solution B.
In terms of the amount, n how many moles of HX are present in Solution B?
I think there are one third n moles.

It then asks to determine the ratio : ____(HX)_____
(X^-)
in solution B ... I AM TOTALLY STUCK WHAT TO DO HERE!

ANY HELP PLEASE
 
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