## Units

Parth Mungra
Posts: 72
Joined: Fri Sep 28, 2018 12:28 am

### Units

What are the units for rate? Also, what are the units for the n or m values in the differential rate law?

Patrick Cai 1L
Posts: 93
Joined: Fri Sep 28, 2018 12:25 am

### Re: Units

The units of the rate law vary with the order of the reaction, with the units of the general differential rate law given as moles/second ([change in concentration]/[change in time]).

Albert Duong 4C
Posts: 66
Joined: Fri Sep 28, 2018 12:17 am
Been upvoted: 1 time

### Re: Units

Rate is typically in mol*L^-1*s*-1 or M/s where M is molarity.

Posts: 60
Joined: Fri Sep 28, 2018 12:19 am

### Re: Units

The rate of a reaction is measured in terms of how fast the concentration of one of the reactants is falling. Its units are mol*L-1*s-1

The exponents m and n are called partial orders of the reaction which depend on the reaction mechanism and can be determined experimentally.

megan blatt 2B
Posts: 61
Joined: Fri Sep 28, 2018 12:28 am

### Re: Units

Like the previous comment said, the rate is in mol*L^-1*s^-1 or M*s-1. The units of the rate constant changes with the order of the overall reaction to ensure that the rate always ends up with the units previously mentioned.

Nina Do 4L
Posts: 61
Joined: Fri Sep 28, 2018 12:27 am

### Re: Units

As everyone stated above, it will be M/L per second and as you increase to each order, you're constantly dividing by 1/M so for zero order, the units will be Moles per second. s^-1
1st order will be per second or s^-1M^-1
and so forth

Posts: 77
Joined: Fri Sep 28, 2018 12:28 am
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### Re: Units

the m and n powers do not have units, they are just experimentally determined values