You have a concentrated stock solution of 10 M NaOH and want to use it to produce a 150 mL solution of 3 M NaOH.What volume of water and stock solutions will you measure out to make this new solution?

Question

Quizplus · Accepted Answer

To prepare a 150 mL solution of 3 M NaOH, we need to use the formula:
M1V1 = M2V2
Where M1 is the concentration of the stock solution, V1 is the volume of the stock solution, M2 is the final concentration of the solution we want to prepare and V2 is the final volume of the solution we want to prepare.
In this case, we want to prepare a solution of 3 M NaOH, which means M2 = 3 M and V2 = 150 mL.
We can rearrange the formula to solve for V1 (the volume of the stock solution we need):
V1 = (M2V2)/M1
Plugging in our numbers, we get:
V1 = (3 M x 150 mL)/10 M = 45 mL
This means we need to measure out 45 mL of the 10 M NaOH stock solution.
To find the volume of water we need, we can subtract the volume of the stock solution from the final volume we want:
Volume of water = 150 mL - 45 mL = 105 mL
Therefore, the answer is D, 105 mL of water and 45 mL of the NaOH stock solution.

You Have a Concentrated Stock Solution of 10 M NaOH