Nope... range of 0-2.5 volts only... because this extra 10K in parallel with your POT.

2x1% 10K in serie, your ADC in the middle... a 0.1uF cap and that's it.

If the source handle this load, and is not that far of the PIC (i doubt because of this ol' 0-10v naming), this shouldn't cause any problem... as usual, software filtering/averaging are your friend.