The label on a bottle of medicine reads "each 5 ml teaspoonful contains glucose, 1.87 g; levulose, 1.87 g; and phosphoric acid, 21.8 mg." a. find the amount of phosphoric acid in the recommended dosage of two teaspoons. b. if the bottle contains 4 ounces, find the quantity of phosphoric acid in the bottle. left parenthesis 1 oz almost equals 30 ml right parenthesis

The amount of phosphoric acid in the recommended dosage of two teaspoons is 43.6 grams.

The quantity of phosphoric acid in the bottle is 523.2 grams.

Explanation:

Given:

The volume of a teaspoonful is 5 mL

In 5 mL of medicine, there are 1.87 grams of glucose,1.87 grams of levulose, and 21.8 grams of phosphoric acid.

1 oz = 30 mL

To find:

a)The amount of phosphoric acid in the recommended dosage of two teaspoons

b) The quantity of phosphoric acid in the bottle

Solution:

a)

Mass of phosphoric acid in 1 teaspoonful = 21.8 g

Mass of phosphoric acid in 5 mL of medicine = 21.8 g

Mass of phosphoric acid in 1 mL of medicine =

Volume of medicine in two teaspoons =

Mass of phosphoric acid in 10 mL of medicine:

The amount of phosphoric acid in the recommended dosage of two teaspoons is 43.6 grams.

b)

Volume of medicine in the bottle = 4 oz

Mass of phosphoric acid in 1 mL of medicine =4.36 g

Mass of phosphoric acid in 120 mL of medicine:

The quantity of phosphoric acid in the bottle is 523.2 grams.

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(a) 43.6 mg; (b) 520 mg

(a) Mass of phosphoric acid (PA) in a dose

Mass of PA = 2 tsp × (21.8 mg PA/1 tsp) = 43.6 mg PA

(b) Mass of PA in the bottle

Step 1. Convert ounces to millilitres

Volume = 4 oz × (30 mL/1 oz) = 120 mL

Step 2. Calculate the mass of PA

Mass of PA = 120 mL × (21.8 mg PA/5 mL) ≈ 520 mg PA

the answer would be c