Dilute aqueous hydrogen peroxide is used as a bleaching agent and for disinfecting surfaces and small cuts. Its concentration is sometimes given as a certain number of "volumes hydrogen peroxide," which refers to the number of volumes of O₂ gas, measured at STP, that a given volume of hydrogen peroxide solution will release when it decomposes to O₂ and liquid H₂O. How many grams of hydrogen peroxide are in 0.100 L of "20 volumes hydrogen peroxide" solution?

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ArpitaK ArpitaK · Answer 1 · 2022-08-28T19:00:15+02:00

The mass of hydrogen peroxide will be 6.07g with0.100 L of "20 volumes hydrogen peroxide" solution

Given data

Its reaction can be written as:

[tex]2H_{2} O_{2}[/tex] ⟶ [tex]H_{2} O+O_{2}[/tex]

If [tex]H_{2} O_{2}[/tex] produces 20 volumes of [tex]O_{2}[/tex].

Then we have 40 volumes of [tex]H_{2} O[/tex] due to the stoichiometry.

We have 0.1×40=4L of [tex]H_{2} O_{2}[/tex] dissolved.

PV=nR*T

Where, P is pressure, V is volume and T is temperature.

At STP, put the value of given data in above equation.

n=101325∗ 0.004/ 8,314∗273.15

n=0.1785mol

m[tex](H_{2} O_{2} )[/tex])=nMr= 6.07g

Therefore, the mass hydrogen peroxide will be 6.07g .

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