Kinds of Organic Reactions Substitution reactions Occur when two reactants exchange parts to give two new products Reaction of an ester such as methyl acetate with water to yield a carboxylic acid and an alcohol 0 0 These two ..give these reactants... Hc-Co Acid CH3 two products. catalyst H3C Methyl acetate Acetic acid Methanol (an ester) (a carboxylic acid) (an alcohol) npeLeaming Alih Resered In biological pathways this type of reaction occurs in the metabolism of dietary fats Substitution reactions ▪ Occur when two reactants exchange parts to give two new products ▪ Reaction of an ester such as methyl acetate with water to yield a carboxylic acid and an alcohol ▪ In biological pathways this type of reaction occurs in the metabolism of dietary fats Kinds of Organic Reactions