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Ch.14 - Chemical Kinetics

Chapter 14, Problem 120

Consider the following mechanism for the decomposition of nitramide 1NH2NO22 in aqueous solution: NH2NO21aq2 + OH-1aq2S NHNO2 -1aq2 + H2O1l2 NHNO2 -1aq2S N2O1g2 + OH-1aq2 (c) How will the rate of the overall reaction be affected if HCl is added to the solution?

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Hello. In this problem, we are told the mechanism for the decomposition of a an adequate solution is described by the following equations. If hydro part is added to the solution, what will happen to the rate of the overall reaction? So when we put hydrochloride in the water, we form hydrochloric acid. Hydrochloric acid is a strong acid. So it associate form hydrogen ions and chloride ions. Those hydrogen ions then will react with hydroxide ions to form water. So when we look at our two step mechanism above, we see that we have hydroxide on the reacting side and then on the product side so it goes into the reaction and goes out unchanged. So the hydroxide is catalyst and we call that a catalyst, will increase the rate of reaction by lowering the activation energy. So when we add the high Drinan's, they will remove hydroxide ions and so hcl well lower the amount of hydroxide iron. And this then will reduce the rate of the reaction. So our overall rate of reaction is decreased by the addition of hcl. Thanks for watching. Hope this helped