In an experiment KClO3 and KCL mix. that is strongly heated. all KClO3 undergoes decomposition. Potassium chloride from orig. sample + KCL weighed 0.9759 g. Gas generated from reaction was coll. over water and V of 257 mL at 21.0 C was obtained. Barometric Pressure= 637.1mm HG. A: mass O2 using gravimetric meas. B moles 02evolved C: Grams potassium chlorate ? D %KClo3 original sample?
ABC and D are the questions asked about the sample.
assuming no O2 is disosolved in the water over shich it was collected, calculate the volume of O2 collected under standard conditions. remember that the pressure of o2 over the water must be calculated from the varometric pressure after taking into consideration the vapor pressure of water.