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👍
2 answers
I need help with this too.
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.
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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