1. Why was it necessary to subtract the volume of the H2O2 solution injected int

Question

1. Why was it necessary to subtract the volume of the H2O2 solution injected into the generator from the volume of the gas collected in the gas collection in the gas collection tube? Explain.

2. Would the amount of collected gas in the gas collection tube have been higher, lower, or the same if 4 g of MnO2 were added to the reaction tube instead of 2 g? Explain

3. At the end of your experiement, what substances are left in your reaction tube?

4. A student performs this experiement using a 5.2% hydgrogen peroxide solution. Given the following data, determine the molar volume of the collected gas.

3.0 mL of peroxide solution in syringe

58.9 mL gas collected

room temp= 23 celcius

Barometric pressure in lab= 760.6 mm Hg

Vapor pressure of water at 23 Celcius = 21.07 mm Hg

Explanation / Answer

1. because the volume of gas collected was from air displaced by injecting the liquid, as well as the amount of O2 produced

and all we want is that volume due to the O2 produced

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