Write a reaction that is used in distinguishing an aldose from a ketose. How does an aldose react with phenylhydrazine? Give the reaction involved and explain.

A common reaction used to distinguish between aldoses and ketoses is the formation of an osazone derivative with phenylhydrazine. When an aldose reacts with phenylhydrazine in the presence of _____ _____ _________ ____ ___ _____ ____ ______ ________ _______.
____ _____ ______ _______ ____ _______ ___.
_________ ____ ____ _______ _______.
________ _____ ______ __________ ___ __________.
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_________ ______ _________ ___ _____ ______ _________ ___ ____ ______ ____ __________.
______ _________ ____ _____ _____ ________ _____ ____ _____.
__________ _____ _________ __________ ___ ______ ____ ________ ____ __________ ________.
__________ _____ ___ ______ _______ _____.
____ _______ _______ ____ __________ _____ _______ ________ _________.
________ _____ _____ _________ _______.
__________ _____ ___ ________ __________ ______ ________ ___.
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__________ ________ ______ _______ ___ _________ ___.
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