Answer:
To determine the concentration of the stock solution, we can use the formula:
C1V1 = C2V2
Where:
C1 = concentration of the stock solution
V1 = volume of the stock solution used
C2 = concentration of the final solution
V2 = volume of the final solution
In this case, we have:
C1 = ?
V1 = 2.3 mL
C2 = 0.65 M
V2 = 1.50 L
First, we need to convert the volume of the stock solution from milliliters (mL) to liters (L):
V1 = 2.3 mL ÷ 1000 mL/L
V1 = 0.0023 L
Now, we can rearrange the formula to solve for C1:
C1 = (C2 * V2) / V1
C1 = (0.65 M * 1.50 L) / 0.0023 L
Calculating this expression gives us:
C1 ≈ 423.91 M
Therefore, the concentration of the stock solution is approximately 423.91 M.
Step-by-step explanation: