You should put a next page section break (via Insert menu) between the two
chapters, and set footnotes to "restart each section" (via Insert |
Footnote, click Options, change setting, OK, click Close to save changes but
not insert another note, though if you do insert it, Undo will undo the
insert but not the setting change).

For more and related info:
http://www.mvps.org/word/FAQs/Formatting/WorkWithSections.htm
http://home.earthlink.net/~wordfaqs/HeaderFooter.htm  (in case you are doing
other chapter-based formatting)

Thanks Daiya