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In the reduction of benzophenone with NaBH4... After dissolving benzophenone in methanol and adding sodium borohydride,...

In the reduction of benzophenone with NaBH4...
After dissolving benzophenone in methanol and adding sodium borohydride,
(a). Why do we add ice water to the mixture and then heat it?
(b). Why does the addition of water precipitate the product?

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