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Question Number 26 from chapter hydrogen. How is the strength calculated in terms of %?
When a 3% solution of H2O2 decomposes completely, it produces 10 times as much volume of gas as was the initial volume of liquid. This is the common hydrogen peroxide available in stores. I buy it often.So, it would seem intuitive that "20 volume Hydrogen Peroxide" would be a 6% solution.To check, let's take 1 liter of H2O2 and let it decompose: 20 liters of O2 is 20/22.4 = 0.893 moles of O2. To get 0.893 moles of O2, you must have started with 2 x 0.893 = 1.786 moles of H2O2, which weighs 60.7 grams. Looks like it's close to 6% (ignoring density of the 6% solution).
When a 3% solution of H2O2 decomposes completely, it produces 10 times as much volume of gas as was the initial volume of liquid. This is the common hydrogen peroxide available in stores. I buy it often.
So, it would seem intuitive that "20 volume Hydrogen Peroxide" would be a 6% solution.
To check, let's take 1 liter of H2O2 and let it decompose: 20 liters of O2 is 20/22.4 = 0.893 moles of O2. To get 0.893 moles of O2, you must have started with 2 x 0.893 = 1.786 moles of H2O2, which weighs 60.7 grams. Looks like it's close to 6% (ignoring density of the 6% solution).
I didn`t get it.I found its strenght as 6.07 How can i convert it to %strength
Dear student 6.07 represents percentage here. As options are given in integers hence answe is 6 %. hope it helps Regards Arun
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