Question

QUESTION 2
Prepare 25 mL of a 60 mg/mL solution from a stock supply of 0.5 g/5 mL.
How many milliliters of the solute (stock solution) are needed?
How many milliliters of the solvent (water) are needed?
O a. 15 mL solute; 10 mL solvent
O b. 21 mL solute; 8 mL solvent
O c. 17 mL solute; 9 mL solvent
O d. 25 mL solute; 10 mL solvent

Answer 1

The number of solute (stock solution) needed are 15 mL solute and the number of solvents (water) is needed 10 ml. The correct option is a.

What is molarity?

Molarity is the measure of the concentration of any solute per unit volume of the solution.

Given that the 25 mL of a 60 mg/mL solution

Dose in hand = 0.5 g / 5ml =

500 mg / 5ml = 100 mg/ml

D= 60 mg x 25 = 1500 mg

Molarity = n / V

1500 mg / 100 mg/ml = 15 ml solute

The number of solutes then minus by the total stock supply

15 - 5 ml = 10 ml solvent

Thus, the correct option is a. 15 mL solute; 10 mL solvent.

To learn more about molarity, refer to the link:

https://brainly.com/question/14562993

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