<PAGE>
Exhibit 5 and 23.2
September 12, 2000
Securities and Exchange Commission
Judiciary Plaza
450 Fifth Street, N.W.
Washington, D.C. 20549
Re: BANK ONE CORPORATION
Form S-3 Registration Statement
-------------------------------
Ladies and Gentlemen:
I am Chief Legal Officer and Secretary of BANK ONE CORPORATION, a Delaware
corporation (the "Company"), and in such capacity, I, or members of my staff
subject to my supervision, have represented the Company in connection with the
preparation of the Company's Registration Statement on Form S-3 concurrently
being filed with the Securities and Exchange Commission (the "Registration
Statement") relating to up to 2,000,000 shares (the "Shares") of the Company's
common stock, $0.01 par value per share, which may be offered and sold by the
stockholders named in the Registration Statement.
In rendering this opinion, I have reviewed such corporate records and other
documents and have made such further examinations and inquiries as I have deemed
necessary to enable me to express the opinions set forth herein. Based on the
foregoing, I am of the opinion that the Shares have been validly issued and are
legally authorized, fully paid and nonassessable.
I am a member of the Bar of the State of Illinois, and I do not express any
opinion herein concerning any law other than the law of the State of Illinois,
the federal law of the United States and the Delaware General Corporation Law.
I hereby consent to the filing of this opinion as an exhibit to the
Registration Statement and to the use of my name whenever it appears in such
Registration Statement, including the Prospectus and any Prospectus Supplement
constituting a part hereof, as originally filed or as subsequently amended.
Very truly yours,
/s/ Christine A. Edwards
