H2O2 dillution

20 Volume = 6% of 100vol

To prepare a 20V hydrogen peroxide solution from 30%, you will need to use the following formula: C1V1 = C2V2Where C1 is the concentration of the original solution (30%), V1 is the volume of the original solution, C2 is the desired concentration (20%), and V2 is the desired volume.You can use this formula to calculate the volume of original solution needed to make the desired solution. For example, if you want to make 100mL of 20% hydrogen peroxide solution, you would need to use 50mL of 30% hydrogen peroxide solution.When handling hydrogen peroxide, it is important to use proper safety precautions, including wearing gloves and eye protection. Additionally, hydrogen peroxide should be stored in a cool, dark place, as light and heat can cause it to break down. 

The volume indicates the concentration of peroxide in the solution.

3% = 10 volume

6% = 20 volume

12% = 40 volume

30% = 100 volume

35% = 130 volume

20% H2O2 

H2O2 required is 34 MW × 0.20 M= 0.680 g/1000 mL is 20 mM

0.0680 g x (100 mL/30 g) = 2.267 mL

so, take 2.267 mL of 30% (w/v) H2O2 and make up the volume to 1 litre.

If you want to make up an exact amount, you need a measuring jug graduated in mL or similar.

To exactly make up 1L (1000mL) of a 6% solution, you need:

6/35 x 1000 = 171.4 mL of your 35% mix, topped up to 1000mL with water.

For other %ages, use the number you want in place of the 6. 

1) convert 30% to 30 g/100 mL

(2) convert 30 g/100 mL to 30 g/L

(3) divide 30g by the molar mass of H2O2; this gives you the moles H2O2 per L (M) of the 5% H2O2

(4) multiply the molarity in (3) by 1000 to get mM of the 5% H2O2

(5) use M1V1 = M2V2 to solve for V1 (you will need to decide on a volume of the 5 mM solution you want to prepare):

M1 = ____ mM (calculated in step (4)

V1 = unknown (what you are solving for)

M2 = 5 mM

V2 = (what ever volume you choose to prepare)