1.

In the formation of so2 and so3 the ratio of their weights of oxygen which combines with 10kg of sulphur is

Answer»

The ratio of weights of OXYGEN = 2 : 3

  • Given , formation of SO2 and SO3
  • MASS of Sulphur = 10 kg
  • Moles of Sulphur = 10 * 10^3 g /32 g/mol = 0.3125 * 10^3 moles
  • Now the reactions involved are:                                                                S + O2 ⇒ SO2    ,     2S + 3 O2 ⇒ 2SO3
  • Now ,it is clear 1 mole of S requires 1 mole of O2 to form 1 mole SO2
  • Also, 2 moles of S requires 3 moles of O2 to form 2 moles of SO3
  • So,0.3125 * 10 ^3 moles of Sulphur combines with 0.3125 * 10^3 moles of Oxygen to from SO2.
  • Also, 0.3125 * 10 ^3 moles of S combines with 0.3125 * 10^3 * 3/2 moles of Oxygen to form SO3
  • We KNOW, 1 mole of O2 = 32 GM of O2
  • 0.3125 * 10 ^3 mole of O2 = 10 * 10^3 gm of O2
  • 0.3125 * 3/2 * 10^3 mole of O2 = 15 * 10^3 gm of O2
  • Therfore mass ratio of SO2 : SO3 = 10 : 15 = 2:3.


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