I HAVE ANSWERED PART A PLEASE SOLVE PART B

A toxic waste product A is to be removed from a fluid in a well-stirred holding tank with volume V by adding a quantity of material B to the tank. Material B reacts with the A and the resulting compound C is non-toxic. The rate at which B reacts with A is proportional to the concentrations of both A and B. The constant of proportionality is k.

a. Find the time requires for the concentration of A to drop to one hundredth of its original concentration if the initial amount of A is 3 moles and B is continuously added to the tank to maintain 6 moles of B at all times. Take k = 1.0 x 105 L2 mol-1 min-1 , V = 4000 L.

b. Repeat Problem 1a, with 6 moles of B added at t=0 and no additional B is added after that.

1)A+BCrA=CACBtdUAKBCACACA+CAdCA=kCBSD+dtlnCAlCACA=kCBtlnnCAOCA=kCBtwhenC00CA=1003,CB=VmB=40006=0.0015mol/Lh1003=(1.105)(0.0015)t150ln(3/100)=tt0.0234min=1.40sec1 you could reduce this time by increasing the amount of B continuously a dded