A 5 mL solution of H2O2 liberates 0.508 g of Iodine from an acidified KI solution. What is the volume strength of the H2O2 solution ?

Meq.  of  H2O2  =Meq.  of  I2⇒   WH2O234 ×  2 × 1000=0.508254 ×2×1000∴   WH2O2  =  0.068  gH2O2  →   H2O  +  12 O2∵   34  g  H2O2  gives  11.2  litres  of  O2  at STP∴   0.068  g  gives  =  11.234  ×  0.068=22.4  ml  O25ml of H2O2(0.068g)→22.4mi O21ml of H2O2          →     ?∴   Volume  Strength  of  H2O2 =22.45=4.48  volume