Question

A reaction with stoichiometric equation 1/2A + B = R + 1/2S has the following rate...

A reaction with stoichiometric equation 1/2A + B = R + 1/2S has the following rate expression –rA = 2CA 0.5 CB. What is the rate expression for this reaction if the stoichiometric equation is written as A + 2B = 2R + S?

Homework Answers

Answer #1

Reaction equation: ½ A + B ====> R + ½ S

Rate of disappearance of A, -rA = k[A]0.5[B]

Can also be written as   -rA = k CA0.5 CB

rate expression given for the above reaction equation = -rA = 2 CA0.5 CB.

So the rate constant, k, of the reaction = 2

If the stoichiometric equation is written as A + 2B = 2R + S

Then the rate of disappearance of A will be, -rA = k[A][B]2

Can also be written as   -rA = k CA CB2

Since rate constant, k, of the reaction = 2

The rate of disappearance of A will be, -rA = 2[A][B]2

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Suggest a mechanism for below reaction: 2A+B → R when at the beginning the reaction rate...
Suggest a mechanism for below reaction: 2A+B → R when at the beginning the reaction rate is linearly proportional to concentration of CA, but at the end is proportional to CA2 .
For the homogeneous autocatalytic reaction A + B → B + B, where –rA = kCACB,...
For the homogeneous autocatalytic reaction A + B → B + B, where –rA = kCACB, aconversion rate of A of X = 0.44. The velocity constant is k = 10-3  m3 / (mol s). The feed stream of 0.1 m3 / s contains A with CA0  = 90 mol / m3 and B with CB0 = 10 mol / m3. It is considered whichreactor configuration that will be most suitable 1.1 The reaction must take place in a flow reactor. Set...
1. At a certain time in a reaction, substance A is disappearing at a rate of...
1. At a certain time in a reaction, substance A is disappearing at a rate of 1.0 x 10−2 M/s, substance B is disappearing at a rate of  2.0 x 10−2 Μ/s, and substance C is appearing at a rate of 6.0 x 10−2 M/s. Select the correct stoichiometry of the reaction being studied. 1A + 2B → 6 C 4A → 2B + 3C 2A → B + 3C A + 2B → 3C A → 2B + 3C 2....
Based on the three step mechanism below, what is the rate law for the reaction 2A...
Based on the three step mechanism below, what is the rate law for the reaction 2A + 2B →E + G? A + B ⇌ D (Fast equilibrium) D + B →E + F ( slow) A + F → G (fast
The following is known about the reaction below: Chemical reaction: 2A-->2B The order of A is...
The following is known about the reaction below: Chemical reaction: 2A-->2B The order of A is second order If you start out with 2.75 M of A, after 5 minutes you will have 2.00M From these facts, determine: a) the rate law constant, K b) the first half life c) from time 0, how long will it take to reach 25% of the original concentration of A d) what is the concentration of A after 10 minutes?
1.) 2A → B + C The above reaction is run and found to follow second...
1.) 2A → B + C The above reaction is run and found to follow second order kinetics with a rate constant of 1.30 x 10-3 M-1sec-1. If the initial concentration of A is 1.33 M, what is the concentration after 164 seconds? 2.) 2A → B + C Two trials of the above reaction are run with the same initial concentration of A. The first trial is performed at 25oC and the second at 35oC. If the rate constant...
Consider the following recursive equation s(2n) = 2s(n) + 3; where n = 1, 2, 4,...
Consider the following recursive equation s(2n) = 2s(n) + 3; where n = 1, 2, 4, 8, 16, ... s(1) = 1 a. Calculate recursively s(8) b. Find an explicit formula for s(n) c. Use the formula of part b to calculate s(1), s(2), s(4), and s(8) d Use the formula of part b to prove the recurrence equation s(2n) = 2s(n) + 3
3. A certain reaction has the following general form: 2A > B Concentration vs time data...
3. A certain reaction has the following general form: 2A > B Concentration vs time data were collected for this reaction, at 50°C and an initial concentration of 0.0200 M. It is determined that a plot of ln[A] vs. time resulted in a straight line with a slope value of - 2.97 X 10-2 min-1. A. Write the rate law. B. Write the integrated rate law C. What is k for this reaction (or what is the rate constant for...
For the reaction 2A + B = 2C + , the following data were measured at...
For the reaction 2A + B = 2C + , the following data were measured at 100 C. Experiement # Inital [A] (mol/L) Initial [B] (mol/L) Initial Rate (mol/L*min) 1 0.300 0.150 3.58 * 10 ^ -3 2 0.500 0.150 6.01 * 10 ^ -3 3 0.300 0.350 1.91* 10 ^ -2 a) What is the order of the reaction? b) Calculate the rate constant and indicate its units
1. Given the reaction 2A + 3B à C + 4D the reaction is zeroth order...
1. Given the reaction 2A + 3B à C + 4D the reaction is zeroth order with respect to A and second order with respect to B. If the concentration of both A and B are doubled and the temperature remains unchanged, the rate of the reaction will increase by a factor of what?   Why? 2.      The kinetics of the reaction A+B à P were studied. The following data was collected. What is the rate law for this reaction?   Why?...