How much stock solution of hydrogen peroxide 8% will you need to make 320ml of hydrogen peroxide 2% solution? ____
To calculate the amount of stock solution of hydrogen peroxide 8% needed to make a 320ml of hydrogen peroxide 2% solution, we can use the following formula:
C1V1 = C2V2
Where:
C1 = concentration of the stock solution (%)
V1 = volume of the stock solution (ml)
C2 = concentration of the desired solution (%)
V2 = final volume of the desired solution (ml)
First, let's plug in the values we know into the formula:
C1 = 8%
V1 = ?
C2 = 2%
V2 = 320ml
Now, rearrange the formula to solve for V1:
V1 = (C2 * V2) / C1
V1 = (2% * 320ml) / 8%
Next, convert the percentages to decimals:
V1 = (0.02 * 320ml) / 0.08
V1 = (6.4ml) / 0.08
V1 = 80ml
Therefore, you will need 80ml of the stock solution of hydrogen peroxide 8% to make a 320ml of hydrogen peroxide 2% solution.