Chemical A is a color agent added to a number of processed foods. Its molecular size is about 30 nm… Show more Chemical A is a color agent added to a number of processed foods. Its molecular size is about 30 nm and it does not bind with plasma proteins. Chemical A is a weak acid with a pKa of 5.5. Assuming the pH of the stomach is 1, the pH of the blood is 7, and the pH of the small intestine is 8.5, describe the absorption, distribution, biotransformation and excretion of Chemical A in a human. • Show less