Rate Law

[Mjhavok]

Can anyone explain the differential rate law to me please.



Also on a different note why is per litre written as DM-3. The -3 is supposed to be raised up ont he M.

[sdekivit]

first: per 1 L = 1 dm^-3

the rate law is gained by solving a differential equation, the chnage in concentration in time.

[RobJim]

The differential rate law relates the rate of reaction to the concentrations of the various species in the system.

Source

So, it's an equation which tells you how fast the reaction will go at any instant if you plug in the concentrations of species in the mix at that instant.

1 liter is dm^3; that is, the volume of a cube with sides of 0.1 meter. If something (call it s) is 'per liter' that is written mathematically as a fraction: s/liter, with the liter on the bottom. An equivalent way to write this is s x L^-1, which equals s x (dm^3)^-1 which equals s x (dm)^-3. Your use of capitals - that is, writing decimeter as DM - is incorrect and if you've seen a liter equated to 'DM^-3' your source has used the capitals improperly. DM means decamolar, not decimeter.

[Mjhavok]

Thanks alot guys,

This has helped.