Chlorite reduced by bromide 4.6×10^(-6) M/s

Chlorite is reduced by bromide in acidic solution

according to the following balanced equation:

ClO2^-(aq) + 4Br^-(aq) + 4H^+(aq)

→ Cl^-(aq) + 2Br2(aq) + 2H2O(l)

a) If Δ[Br2]/Δt = 4.6×10^(-6) M/s,

what is the value of Δ[ClO2^-]/Δt

during the same time interval?

b) What is the average rate of consumption

of Br^- during the same time interval?

Express your answer to two significant figures

and include the appropriate units.

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[참고] 평균 반응 속도

[참고] 반응 속도의 종류. 반응 속도식의 종류

a) If Δ[Br2]/Δt = 4.6×10^(-6) M/s,

what is the value of Δ[ClO2^-]/Δt

during the same time interval?

–Δ[ClO2^-]/Δt = (1/2) Δ[Br2]/Δt

Δ[ClO2^-]/Δt = –(1/2) Δ[Br2]/Δt

= –(1/2) (4.6×10^(-6))

= –2.3×10^(-6) M/s

---> (–)부호는

반응물인 ClO2^-의 소모(소비) 속도임을 의미.

답: 2.3×10^(-6) M/s

b) What is the average rate of consumption

of Br^- during the same time interval?

–(1/4) Δ[Br^-]/Δt = (1/2) Δ[Br2]/Δt

Δ[Br^-]/Δt = –(4/2) Δ[Br2]/Δt

= –(4/2) (4.6×10^(-6))

= –9.2×10^(-6) M/s

---> (–)부호는

반응물인 Br^-의 소모(소비) 속도임을 의미.

답: 9.2×10^(-6) M/s

[키워드] 평균 반응 속도 기준