Experiment S Post Lab Question while common consumer peroxide products fall in t

Question

Experiment S Post Lab Question while common consumer peroxide products fall in the 1-3% range, commercial solutions ofperoude can be as high as 30% peroxide. Could this method be used to measure peroxide concentrations in this range? peroxide asume that the Problem 1-Calculate the volume of gas you would expect to produce using 1.00 mL of 30% atmospheric pressure is 760 torr and the temperature of your water is 22 C. Can this volume be measured using the 50 mL. buret in this apparatus? Problem 2- Will the peroxide still be the limiting reagent or will we need to increase the amount of permanganate in the reaction?

Explanation / Answer

Problem1:

H2O2 = H2 + O2 , then

V = 1 mL, at 30% --> 0.3*1 = 0.3 g

mol of H2O2 = mass/MW = 0.3/34 = 0.0088

then

mol of H2+O2 = 2*0.0088 = 0.0176

V = nRT/P

Pvapor 22°C = 19.8

V = (0.0176)(62.4*(22+273)/(760-19.8) = 0.4376 Liters = 437.6 mL

NO, we cant measure this with a buret, burets are not used for this kind of measurements.

Problem 2:

Peroxide is always the limiting reactnat, peroxide is only a catalyst, it is not consumed

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