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

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05-09-2018
Chemistry

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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

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znk znk · Answer 1 · 2018-09-05T15:57:33+02:00

znk znk

05-09-2018

(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

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Tringa0 Tringa0 · Answer 2 · 2021-09-14T19:39:40+02:00

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 = [tex]\frac{21.8}{5} g=4.36 g[/tex]

Volume of medicine in two teaspoons = [tex]5mL \times 2=10 mL[/tex]

Mass of phosphoric acid in 10 mL of medicine:

[tex]=4.36\times 10 g=43.6 g[/tex]

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

[tex]1 oz = 30 mL\\4oz=4\times 30 mL=120 ml[/tex]

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

Mass of phosphoric acid in 120 mL of medicine:

[tex]=4.36\times 120 g=523.2 g[/tex]

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

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