# Chemistry

Hydrogen peroxide solution, H2O2(aq), is available with a concentration of 1.667mol/L. When diluted to a concentration of 0.25mol/L, the solution is used as a disinfectant. What volume of water should be added to 100 mL of the concentrated hydrogen peroxide solution to prepare the disinfectant?

And this one too please thx👍

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1. I need help with this too.

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2. Hey Lori and others who would like to know the answer, the formula you should be using in this case would be the Dilution formula.

C1(V1)=C2(V2) (the ones and twos are subscripts).
Once you get the formula all written down, the work should look like this:

C1(V1)=C2(V2)
1.667 mol/L(0.100L)=0.25 mol/L(V2)
0.1667/0.25 = 0.25/0.25(V2)
0.6668 (0.67 significant figures).

Therefore, you would need to add roughly 670 mL of water, or 0.67 L of water to get the 0.25 mol/L dilution you want.

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