Question

Given the following equation Br2(g) + 3F2(g) ---> 2BrF3(g), if -Δ[F2]/Δtime = 2.4 x 10-4 M/s,...

Given the following equation Br2(g) + 3F2(g) ---> 2BrF3(g), if -Δ[F2]/Δtime = 2.4 x 10-4 M/s, then what is the value of Δ[BrF3]/Δtime

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Answer #1

Br2(g) + 3F2(g) ---> 2BrF3(g)

Remember

Rate of reaction = - Rate of disappearance of reactant = rate of appearance of product

Therefore in above reaction

Rate of disappearance of F2 = Rate of disappearance of Br2 = rate of appearance of BrF3

Rate of disappearance of F2 = rate of appearance of BrF3

In a reactio aA ------->bB

Rate of disappearance of =- 1/a Δ[A]/Δtim and

rate of appearance of B = 1/b Δ[B]/Δtim

Therefore

Rate of disappearance of F2 =   -1/3 Δ[F2]/Δtime

rate of appearance of BrF3 = (1/2) X Δ[BrF3]/Δtime

-1/3 Δ[F2]/Δtime = (1/2) X Δ[BrF3]/Δtime

(1/3) 2.4 x 10-4 = (1/2) X Δ[BrF3]/Δtime

Δ[BrF3]/Δtime = (2/3) X 2.4 x 10-4

Δ[BrF3]/Δtime = 1.6 X 10-4 M/s

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