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April 26, 2015

Homework Help: Chemistry

Posted by Roman on Tuesday, March 27, 2012 at 5:16am.

The reaction between NO (nitric oxide) and oxygen is a key step in the formation of
acid rain.

O2(g) + 2NO(g) → 2NO2(g)


A series of experiments were run, each of which starts with a different set of reactant concentrations. From each experiment an initial rate of reaction was obtained.


======Initial concentration=========
==== mol dm-3 ========= == ====Initial rate of reaction=========
======================= = ===(mol dm-3 s-1)
Expt.------- [O2] ======------ [NO]
1) ---- -- 1.10x10-2 === 1.30x10-2 == 3.20 x 10-3
2 --- -- 2.20x10-2 === 1.30x10-2 == 6.40 x 10-3
3 --- -- 1.10x10-2 === 2.60x10-2 == 1.28 x 10-2
4 ----- 3.30x10-2 === 1.30x10-2 == 9.60 x 10-3
5 ----- 1.10x10-2 === 3.90x10-2 == 2.88 x 10-2


a) Using the data from the table, determine the orders of reaction with respect to O2 and NO. Explain your reasoning.

(b) Write a rate equation for this reaction.

(c) Determine the overall order of reaction.

(d) Calculate the rate constant (k) for this reaction, express your answer to the appropriate number of significant and give the units

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