In the Cannizzaro Reaction, added hydroxide is a ( catalyst / product / reagent ) because it is ( incorporated into the product / isolated from the reaction / regenerated in the reaction ). In the first step of a Cannizzaro Reaction, such as benzaldehyde with base, the hydroxide attacks the ( oxygen of / carbon of / hydrogen alpa to ) the carbonyl group because that position (is partially positive / is partially negative / can form an enol ).