Unit for reaction rates


Moderators: Chem_Mod, Chem_Admin

Diviya Khullar 1G
Posts: 59
Joined: Fri Sep 28, 2018 12:19 am

Unit for reaction rates

Postby Diviya Khullar 1G » Tue Mar 05, 2019 11:30 pm

When calculating the rate of a reaction, will the units include time? For example, will it be L

Vanadium Wang 4H
Posts: 60
Joined: Fri Sep 28, 2018 12:19 am

Re: Unit for reaction rates

Postby Vanadium Wang 4H » Tue Mar 05, 2019 11:45 pm

The unit will include time because the rate of a reaction is measured in M/s or mol*L-1*s-1

MaanasO 1A
Posts: 72
Joined: Fri Sep 28, 2018 12:26 am

Re: Unit for reaction rates

Postby MaanasO 1A » Wed Mar 06, 2019 8:00 am

The reaction rate is based on change in M w/ respect to time, so you'll need M/s as the final units.

taline_n
Posts: 64
Joined: Fri Sep 28, 2018 12:17 am

Re: Unit for reaction rates

Postby taline_n » Wed Mar 06, 2019 9:02 am

The rate of the reaction will always be in terms of mol/L•s, but the units for k changes based on the overall order of the reaction. If order=1, the unit for k is s^-1. If order=2, the unit for k is L/mol•s. If order=3, the unit for k is L^2/mol^2•s.

Lorena Zhang 4E
Posts: 63
Joined: Fri Sep 28, 2018 12:16 am

Re: Unit for reaction rates

Postby Lorena Zhang 4E » Wed Mar 06, 2019 8:34 pm

The final rate would always be M/s or mol/(L*s). Therefore, if the order of the reaction changes, in order to reach the final unit of M/s, the unit of k will have to change.


Return to “General Rate Laws”

Who is online

Users browsing this forum: No registered users and 2 guests