If Rate = k[A] 0 [B] 1/2 [C] 2 1. By what factor doe the reaction rate change if

Question

If Rate = k[A]0[B]1/2[C]2 1. By what factor doe the reaction rate change if if [A]is doubled and the other reactant concentrations are held constant?I said it was zero because this reaction is zero order with respectto [A] there fore [A] will not influence this reaction. Itsaid I was wrong (using mastering chemistry program for thisclass). 2. By what factor does the reaction rate change if [B] isdoubled and the other reactant concentrations are heldconstant? 3. By what factor does the reaction rate change if [C]is doubled and the other reactant concentrations are held constant?Would it increase by 4 4. By what factor does the rate change if the concentration ofall three reactants are doubled? Help! I don't understand this....promise to rate. Thanks If Rate = k[A]0[B]1/2[C]2 1. By what factor doe the reaction rate change if if [A]is doubled and the other reactant concentrations are held constant?I said it was zero because this reaction is zero order with respectto [A] there fore [A] will not influence this reaction. Itsaid I was wrong (using mastering chemistry program for thisclass). 2. By what factor does the reaction rate change if [B] isdoubled and the other reactant concentrations are heldconstant? 3. By what factor does the reaction rate change if [C]is doubled and the other reactant concentrations are held constant?Would it increase by 4 4. By what factor does the rate change if the concentration ofall three reactants are doubled? Help! I don't understand this....promise to rate. Thanks 1. By what factor doe the reaction rate change if if [A]is doubled and the other reactant concentrations are held constant?I said it was zero because this reaction is zero order with respectto [A] there fore [A] will not influence this reaction. Itsaid I was wrong (using mastering chemistry program for thisclass). 2. By what factor does the reaction rate change if [B] isdoubled and the other reactant concentrations are heldconstant? 3. By what factor does the reaction rate change if [C]is doubled and the other reactant concentrations are held constant?Would it increase by 4 4. By what factor does the rate change if the concentration ofall three reactants are doubled? Help! I don't understand this....promise to rate. Thanks

Explanation / Answer

As per the rate law given by you , Rate =k[A]0[B]1/2[C]2 = k X 1X[B]1/2[C]2 1)if the concentration of A is doubled then the rate lawis  Rate =k[2A]0[B]1/2[C]2 =  Rate= k X 1X [B]1/2[C]2 so the factor is1, the rate will not change. 2)if the concentration of B is doubled then therate law is  Rate =k[A]0[2B]1/2[C]2 =  Rate= k X 1X 2[B]1/2[C]2 so the factoris2, the rate will be enhanced 2 times. 3)you are very correct.the rate increses 4 times.observe the rate law. Rate = k X 1X[B]1/2[2C]2 = k X 1X [B]1/2 X4[C]2 = 4k [B]1/2 [C]2 so the factoris4, the rate will be enhanced 4times.I think by adoptingthis way you can calculate the factor for fourth case. so the factoris2, the rate will be enhanced 2 times. 3)you are very correct.the rate increses 4 times.observe the rate law. Rate = k X 1X[B]1/2[2C]2 = k X 1X [B]1/2 X4[C]2 = 4k [B]1/2 [C]2 so the factoris4, the rate will be enhanced 4times.I think by adoptingthis way you can calculate the factor for fourth case. so the factoris4, the rate will be enhanced 4times.I think by adoptingthis way you can calculate the factor for fourth case.

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