# Chemistry(Please check)

8. The half-life of a reaction was found to be inversely dependent on the concentration of the starting material. Thus, we can say that

a. the reaction is zero order b.the reaction is first order
c.the reaction is second order

d. the reaction starts out first order and changes to second order after one half-life.

e. the reaction starts out second order and changes to first order after one half-life.

I think that the answer is the reaction is second order. Is this correct?

1. 0
2. 0
3. 16
asked by Hannah
1. Here are the equations for half life for
order 0, order 1, and order 2. I didn't include order 3 because those reactions are not very common.
zero order:
half life = (Ao)/2ak

1st order:
half life = ln 2/ak

2nd order:
half life = 1/ak(Ao)

note: a and k are constants.l (Ao) is starting material concn.

You are right; it is second order. That is the only one for which the starting material is inversely dependent on the starting material, (Ao).

1. 0
2. 0
posted by DrBob222

## Similar Questions

1. ### chemistry

The half-life of a reaction was found to be inversely dependent on the concentration of the starting material. Thus, we can say that a. the reaction is zero order b. the reaction is first order c. the reaction is second order d.

asked by elvis on February 19, 2012
2. ### chemistry

The half-life of a reaction was found to be inversely dependent on the concentration of the starting material. Thus, we can say that a. the reaction is zero order b. the reaction is first order c. the reaction is second order d.

asked by elvis on February 19, 2012
3. ### chemistry

The half-life of a reaction was found to be inversely dependent on the concentration of the starting material. Thus, we can say that a. the reaction is zero order b. the reaction is first order c. the reaction is second order d.

asked by elvis on February 18, 2012
4. ### Chemistry

In a given 1st order reaction A ---> products, the initial concentration of A is 0.40 M. What will be the concentration of A after 15 seconds if the half-life of the reaction is 3 seconds? I found the concentration to be 1.25 x

asked by Marcus on February 18, 2013
5. ### Chemistry

Calculate the half-life (in s) of a first-order reaction if the concentration of the reactant is 0.0655 M 18.4 s after the reaction starts and is 0.0173 M 41.2 s after the reaction starts. I got 25.6 Suppose the half-life is 23.7

asked by Anonymous on January 31, 2013
6. ### Chemistry

The reaction 2B--->C + 2D is found to be zero order when run at 990 degrees C. If it takes 3.3X110^2 s for an initial concentration of B to go from 0.50 M to .20 M what is the rate constant for the reaction? what is the half life

asked by Lauren on March 1, 2008
7. ### chem

Butadiene can undergo the following reaction To form a dimer(two butadiene molecules hooked together). 2c4h8---->c8h12. The half life for the reaction at a given temperature is 5.92x10-2 sec. The reaction kinetics are second

asked by court on March 25, 2012
8. ### chemistry

A particular reactant decomposes with a half-life of 103 s when its initial concentration is 0.397 M. The same reactant decomposes with a half-life of 213 s when its initial concentration is 0.192 M. what is the reaction order and

asked by katie on March 24, 2012
9. ### Chemistry

The half-life of the first order reaction, A to products, is 53.2 s. What was the original concentration, (A)0 in moles per liter, if after 1.8 minutes, the concentration of A is 0.0783 moles per liter? Not sure whether to use

asked by Adrianna on March 23, 2011
10. ### chemistry

calculate the half-life of a first- order reaction if the concentration of the reactant is 0.0396 M at 12 seconds after the reaction starts and is 0.00579 M at 47 after the reaction starts. How long does it take for the reactant

asked by saud on November 19, 2011

More Similar Questions