Carbomer, a polymer used to thicken cosmetic lotions and creams, is a polymer of the monomer known as acrylic acid, shown below.

Polymerization occurs due to the C=C double bond as it does for polyethylene.

(a) Draw the polymer.

(b) When this polymer is exposed to aqueous base, it deprotonates, and the resulting carboxylate anion hydrogen bonds to water very well, causing thickening of the aqueous solution. Draw this polymer in its deprotonated form, and show how water would hydrogen bond to it.

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