Consider the following data for the reaetion Aproduct 0.02 M 0.05 0.12 Rate .30

Question

Consider the following data for the reaetion Aproduct 0.02 M 0.05 0.12 Rate .30 x 10 Mi 2.33 x 10" 5.58x10 D, What is the rate law? (Suggestions irst determine the order by the ratio techniqee.) Ds d. Rate-KA Rate-A Rate-k[A bRate-k/TA) Rate-k 9. What is the overall charge of the Copper(iD complex (CuCI(en)j? 10. What is the coordination number of Cu in the complex [CuCI, (en)] from the previous problem? a.3b.5 c. 2 d 4 e.6 The following two problems (11 and 12) refer to the equation: 4 PH,(g)P.(S)+6H, The reaction is first order in PH, (g) and has a rate constant k of 4.79 x 10's 11. what is the half-life, t,? a. 20.9 s b. 3.32 x 10se. 6.91 x 10sd. 35.0s 14.5 12. If [PH,]-0.417 M at time t -0, at what time will [PH]-0.174 M? a. 69.9s b 18.2s c. 50.0s d. 0.0603 s e. 44.1

Explanation / Answer

Ans 8 : a) Rate = k[A]

If we carefully observe the rate of reaction with respect to the concentration of A , we notice that , when the concentration of A is increased 2.5 times , the rate of reaction also increases by the same factor , i.e. 2.5 times.

This indicates that the order of reaction is 1 with respect to A.

So the rate law is given as : Rate = k[A]

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