When heated, solid KClO3 forms solid KCl and O2 gas. A sample of KClO3 is heated and 226 mL of gas with a pressure of 749 mm Hg is collected over water, at 26°C. At 26°C, the vapor pressure of water is 25 mm Hg.
2KClO3(s) → 2KCl(s) + 3O2(g)
How many grams of KClO3 were reacted?
2007-04-26 15:15:23 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
First calculate the volume of the O2 gas that would have been produced under the Standard Temperature and pressure conditions. i.e. use the formula PV/T = P'V'/T'. Now compute the moles of O2 produced. Now 2 moles of KCLO3 give 3 moles of O2, by this calculate the number of moles of KCLO3 used and finally by this u can find out the weight of KCLO3 used in the reaction :)
2007-04-26 15:30:36 · answer #1 · answered by S6 2 · 0⤊ 0⤋
Use the gas equation.
2007-04-27 21:50:35 · answer #2 · answered by ag_iitkgp 7 · 0⤊ 0⤋