The chemist, Anna Lytic, must prepare 1.00 kg of 15.0% (w/w) acetic acid using a stock solution which is 36.0% (w/w) acetic acid (d = 1.045 g/mL). Which of the following combinations will give her the solution she wants?
A)417 mL of 36% acetic acid in 583 mL of distilled water
B)417 g of 36% acetic acid in 583 g of distilled water
C)360 mL of 36% acetic acid in 640 mL of distilled water
D)360 g of 36% acetic acid in 640 g of distilled water
E)150 g of 36% acetic acid in 850 g of distilled water

Question

Quizplus · Accepted Answer

To prepare 1.00 kg of a 15.0% (w/w) solution, 150 g of acetic acid is needed (15% of 1000 g). Option B correctly uses mass (g) for both acetic acid and water, ensuring the final mixture's mass is 1000 g, with 417 g of 36% acetic acid solution providing the required 150 g of acetic acid (since 36% of 417 g is approximately 150 g).

The Chemist, Anna Lytic, Must Prepare 1