Concentrated hydrogen peroxide solutions are explosively decomposed by traces of transition metal ions (such as Mn or Fe):
H202 (aq) --> 2H2O (I) + O2 (g)
What volume of O2, collected at 27 degrees C and 746 torr, would be generated by decomposition of 125 g of a 50.0% by mass hydrogen peroxide solution?
2007-11-30 13:33:00 · 2 answers · asked by confused44 1 in Science & Mathematics ➔ Chemistry
Use molecular weights to calculate how many moles of peroxide you have. Then calculate how many moles of oxygen will be produced. Then calculate volume.
2007-11-30 13:44:36 · answer #1 · answered by Tim C 7 · 0⤊ 0⤋
wt of H2O2 in the given compound is 125/2 = 62.5gm
according to the question 2 moles of H2O2 produces 1 mole of O2 . molecular mass of H2O2 is 34gm . so 64 gm of H2O2 produces 1mole of O2 62.5 gm will produce 0.92 mole
applying equation PV = nRT P= 746/760 atm
V= ? n = 0.92 R = O.0821 T = 273 +27 = 300
we will get V = 23.0 L ( ANS)
2007-11-30 14:03:57 · answer #2 · answered by Anonymous · 0⤊ 0⤋