What Is the Molecular Weight of Starch?


Quick Answer

Starch does not have a set molecular weight; it is a polymer of glucose monomers that are linked together by dehydration reactions. The formula of starch is (C6H10O5)n, where n is the number of glucose monomers linked together.

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Full Answer

The monomer has two hydrogens and one oxygen fewer than a typical glucose molecule. This is due to the dehydration reaction between the monomers, which forms a water molecule in the process of forming the bond. Starch is used by plants to hold excess glucose, and in practice, it can hold anywhere from a few hundred to a few hundred thousand glucose monomers.

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