A sample consisting of chocolate-brown poweder of PbO_2 is allowed to react with excess of Kl and iodine liberated is reacted with N_2H_4 in another container. The volume of gas liberated from this second container at STP was measured out to be 1.12 litre.Find out volume of decimolar NaOH required to dissolve PbO_2 completely. (Assume all reactions are 100% complete). Give your answer divide by 100.

A sample consisting of chocolate-brown poweder of PbO_2 is allowed to

1.	A sample consisting of chocolate-brown poweder of PbO_2 is allowed to react with excess of Kl and iodine liberated is reacted with N_2H_4 in another container. The volume of gas liberated from this second container at STP was measured out to be 1.12 litre.Find out volume of decimolar NaOH required to dissolve PbO_2 completely. (Assume all reactions are 100% complete). Give your answer divide by 100.
Answer» Solution :`PbO_2+4KItoPbI_2+I_2+2K_2O` `N_2H_2+2I_2toN_2+4HI` moles of `N_2` liberated `=11.2/22.4=5xx10^(-2)` mole moleof `PbO_2` reacted `=10^(-1)` mole `PbO_2+2H_2OtoPb(OH)_4` `PB(OH)_4+2NaOHtoNa_2[Pb(OH)_6] or Na_2PbO_2` mole of NAOH required `=10^(-1)xx2` `Vxx1/10xx10^3=2xx10^(-1) " " V=2/10^(-3)=2000` ml