35ml of active ingredient is mixed with distilled water to total 300ml. What is the final concentration (v/v)? ____

To find the final concentration (v/v), we need to calculate the percentage of the active ingredient in the final solution.

First, we need to determine the amount of active ingredient in the 35ml.

Next, we can calculate the percentage of the active ingredient in the final solution by dividing the amount of active ingredient by the total volume of the solution (300ml) and multiplying by 100.

Let's calculate this:

Step 1: Calculate the amount of active ingredient in 35ml.
Step 2: Calculate the concentration (v/v) using the formula: (Active Ingredient Volume / Total Volume) * 100.

Step 1: Amount of active ingredient in 35ml:
In this scenario, we are mixing 35ml of active ingredient with distilled water. Therefore, the amount of active ingredient in 35ml is 35ml.

Step 2: Concentration (v/v):
Using the formula, (35ml / 300ml) * 100, we can calculate the concentration (v/v).

Concentration (v/v) = (35ml / 300ml) * 100
Concentration (v/v) = 11.67%

Therefore, the final concentration (v/v) is 11.67%.