Final answer:
To calculate the concentration of a standard solution after dilution, use the formula C1V1 = C2V2 and rearrange it to solve for C2.
Step-by-step explanation:
When calculating the concentration of a standard solution after dilution, you can use the formula: C1V1 = C2V2, where C1 is the initial concentration, V1 is the initial volume, C2 is the final concentration, and V2 is the final volume. In this case, the initial concentration (C1) of the stock solution is 5.502 x 10⁻⁵ M and the initial volume (V1) is 2.03 ml. The final volume (V2) is the sum of the initial volume and the added volume of water, which is 8.10 ml. Rearranging the formula and substituting the given values will allow you to solve for the final concentration (C2).
Using the formula:
(5.502 x 10⁻⁵ M)(2.03 ml) = C2(2.03 ml + 8.10 ml)
Simplifying the equation will give you the final concentration of the diluted solution.