chemistry
posted by uci student on .
Which equation describes the relationship between the rates at which Cl2 and F2 are consumed in the following reaction?
(Cl)sub2 + 3[(F)sub2] <=> 2 [ClFsub3]
i put d(Cl2)/dt = 3[d(F2)/dt] but apparently that isnt right, and im not quite sure why it isnt. could anyone push me in the appropriate direction?

If aA + bB ==> cC + dD,
rate of rxn = (1/a)(dA/dt) = 1/b(dB/dt) etc.
So wouldn't rate of reaction equal
(1)(dCl2/dt) = (1/3)(dF2/dt) = (1/2)(dClF3/dt)
Check me out. 
well yea, but the only responses listed are as follows:
d(Cl2)/dt = 2[d(F2)/dt]
d(Cl2)/dt = 3[d(F2)/dt]
2[d(Cl2)/dt] = d(F2)/dt
3[d(Cl2)/dt] = d(F2)/dt
d(Cl2)/dt = d(F2)/dt
and none of those make sense. 
d(Cl2)/dt = 3[d(F2)/dt]
2[d(Cl2)/dt] = d(F2)/dt
3[d(Cl2)/dt] = d(F2)/dt
d(Cl2)/dt = d(F2)/dt 
3[d(Cl2)/dt] = d(F2)/dt
3 mol F2 are depleted for each 1 mol Cl2. Thus the rate of depletion of F2 is three times that of Cl2