Which of the following graphs best represents of penicillin, if the reaction is
ID: 959500 • Letter: W
Question
Which of the following graphs best represents of penicillin, if the reaction is second order with respect to penicillin? For the reaction X_2 + Y + Z rightarrow XY + XZ, it is found that doubling the concentration of X_2 doubled the reaction rate, tripling the concentration of Y triples the rate, and doubling the concentration of Z has no effect. What is the rate law for this reaction? What is the unit for the rate constant for this reaction? Why is it that the change in the concentration of Z has no effect on the rate? Another trial was carried out at the same temperature and using the same reaction medium. In this last trial, the concentration of each reactant is triple that in the first trial. Was the initial rate for the second trial greater than, lesser than, equal to, or cannot be determined compared to the first trial? By what factor (If any) did the initial rate of change? Initial rates for the reaction A+B+C rightarrow D+E were measured with various concentrations of A, B, and C as represented in the pictures below. Based on these data, what is the rate law? The initial rate is listed below each picture.Explanation / Answer
22. Answer is (B).
23.
X2 + Y + Z = XY + XZ.
Doubling the concentration of X2, the reaction rate gets double. So, its a first order with respect to X2.
Tripling the concentration of Y, the reaction rate gets tripled. So, its a first order with respect to Y.
Doubling the concentration of Z, the reaction rate doen't change. So, its a zero order with respect to Z.
(a) Rate law of the reaction, r = k [X2] [Y].
(b) Since it a overall second order reaction. Hence the unit of rate constant, k = L mole-1 sec-1.
(c) Since the reaction rate is independent of concentration of Z.
(d)
Here rate, r = k [X2] [Y]
Now, for 3X2 and 3y, the rate will increase by 3 x 3 (= 9) times.
(i) rate will increase.
(ii) rate will increase by 9 times.
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.