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cassidyhead27
27.06.2019 •
Chemistry
The rate of a certain chemical reaction is directly proportional to the square of the concentration of chemical a present and inversely proportional to the concentration of chemical b present. if the concentration of chemical b is increased by 100 percent, which of the following is closest to the percent change in the concentration of chemical a required to keep the reaction rate unchanged? a. 100% decrease b. 50% decrease c. 40% decrease d. 40% increase e. 50% increase
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Ответ:
D. 40 % increase
Step-by-step explanation:
r = k[A]²/[B]
The rate is inversely proportional to [B]. If [B] is doubled, the rate is halved.
We must double this rate to get back to the original.
The rate is directly proportional to [A]².
2 = [A]₂/[A]₁² Take the square root of each side
√2 = [A]₂/[A]₁ Multiply each side by [A]₁
[A]₂ = √2[A]₁
[A]₂ = 1.41[A]₁
We must increase [A] by 41 %.
Ответ:
This equation is a double reaction
Explanation:
I hope this is the answer