At 25°C, some second-order reaction 2 X (g)→ Y (g) + Z (g) has a half-life of 4.62 hours when the initial concentration of X is 3.47 M. How much X will be left after 5.6 hours?
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At 25°C, some second-order reaction 2 X (g)→ Y (g) + Z (g) has a half-life...
+ Half-life for First and Second Order Reactions 11 of 11 The half-life of a reaction, t1/2, is the time it takes for the reactant concentration A to decrease by half. For example, after one half-Me the concentration falls from the initial concentration (Alo to A\o/2, after a second half-life to Alo/4 after a third half-life to A./8, and so on. on Review Constants Periodic Table 11/25 For a second-order reaction, the half-life depends on the rate constant and the...
For some second-order reaction: 2 X (g)→ 2 Y (g) + Z (g). The following data were obtained at 95°C: [A]o = 7.38 x 10-3 M [A]t = 2.67 x 10-3 M t = 720 s Calculate the rate constant for this reaction.
6. Consider the reaction 3A - C. If the reaction is second order with a half-life of 20.00 hrs. Starting the reaction with an initial concentration of A as 0.75M, calculate the time required for the concentration to decrease to 0.25M (8 points)
The half-life of a reaction, t1/2, is the time it takes for the reactant concentration [A] to decrease by half. For example, after one half-life the concentration falls from the initial concentration [A]0 to [A]0/2, after a second half-life to [A]0/4, after a third half-life to [A]0/8, and so on. on. For a first-order reaction, the half-life is constant. It depends only on the rate constant k and not on the reactant concentration. It is expressed as t1/2=0.693k For a...
Consider some first-order reaction: 3 X (g)→ Y (g) + Z (g). At 534 K 22% of X changes to products in 17.3 min. (a) What is the rate constant for this reaction? (b) What is the half-life of X?
2. Answer the following questions by connecting the half-life of each first-order reaction to the rate constant. a. The rate constant of a first-order reaction is 2.43 × 10–2 min–1. What is the half-life of the reaction? (2 points) b. A first-order reaction has a rate constant of 0.547 min-1. How long will it take a reactant concentration 0.14 M to decrease to 0.07 M? (2 points) c. The half-life of a first-order reaction is 5.47 min. What is the...
6. Consider the reaction 3A C. If the reaction is second order with a half-life of 20.0) hrs. Starting the reaction with an initial concentration of A as 0.75M, calculate the time required for the concentration to decrease to 0.25M (8 points)
For a first-order reaction, the half-life is constant. It depends only on the rate constant k k and not on the reactant concentration. It is expressed as t1/2=0.693k t 1 / 2 = 0.693 k For a second-order reaction, the half-life depends on the rate constant and the concentration of the reactant and so is expressed as t1/2=1k[A]0. A certain first-order reaction (A→products A → p r o d u c t s ) has a rate constant of 9.30×10−3...
4) What is the half-life of a second order reaction with the rate constant 0.0271 m 's and the initial concentration 0.902M?
For a first-order reaction, the half-life is constant. It depends only on the rate constant k and not on the reactant concentration. It is expressed as t 1/2 = 0.693 k For a second-order reaction, the half-life depends on the rate constant and the concentration of the reactant and so is expressed as t 1/2 = 1 k[A ] 0 Part A A certain first-order reaction ( A→products ) has a rate constant of 9.90×10−3 s −1 at 45 ∘...