Page 1 of 1

Reaction Rate

Posted: Tue Mar 12, 2019 3:20 pm
by Jaira_Murphy_2D
Given a table of rates and concentrations, when you find the rate constant k, is it the same k for all of the other concentrations?

Re: Reaction Rate

Posted: Tue Mar 12, 2019 4:03 pm
by josie 1C
i believe so, as long as it's all the same products and reactants

Re: Reaction Rate

Posted: Tue Mar 12, 2019 4:30 pm
by RachelCheung1A
Yes as long as it is the same formula and under same conditions (ex. temp)

Re: Reaction Rate

Posted: Tue Mar 12, 2019 9:40 pm
by George Ghaly 2L
k is a specific for a certain temperature, so if the reaction takes place at the specified temperature then the k would be the same.

Re: Reaction Rate

Posted: Tue Mar 12, 2019 10:38 pm
by Noah Fox 1E
Wait, I thought initial concentration would be included especially for second order reactions

Re: Reaction Rate

Posted: Tue Mar 12, 2019 11:19 pm
by Yiting_Gong_4L
It is the same k as long as you use the same products and reactants because the numbers they give are under the same temp.

Re: Reaction Rate

Posted: Sat Mar 16, 2019 11:16 pm
by 204929947
when given a table, you can use any reaction and the values to kind K, right?

Re: Reaction Rate

Posted: Sun Mar 17, 2019 12:07 am
by CristinaMorales1F
What is a reaction rate and how does it relate to the rate law?

Re: Reaction Rate

Posted: Sun Mar 17, 2019 4:34 pm
by lukezhang2C
Yes, the K value should be the same for all since you need to use the different concentrations and initial rates in order to find K in the first place.

Re: Reaction Rate

Posted: Sun Mar 17, 2019 4:35 pm
by lukezhang2C
CristinaMorales1F wrote:What is a reaction rate and how does it relate to the rate law?


The reaction rate is the rate of which the reaction proceeds (in M/s) and is related to the rate law as the rate law is used to calculate the initial rates of the reaction. In a problem typically we would use the reaction rate to find the K value, or any missing values from the rate law equation.

Re: Reaction Rate

Posted: Sun Mar 17, 2019 4:41 pm
by lukezhang2C
204929947 wrote:when given a table, you can use any reaction and the values to kind K, right?


Yes, you should be able to use any of the values given to find k as long as they correspond to one another. For example, using random concentrations for an initial rate which was found using other concentrations would not yield a correct answer.