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Mjhavok
Probably not a bot. Junior Member.
Joined: 14 Oct 2005
Posts: 3
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 Posted: Fri Oct 14, 2005 11:44 am Post subject: Rate Law |
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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.
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sdekivit
Regular
Joined: 26 Jul 2005
Posts: 37
Location: Holland
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| Posted: Sat Oct 15, 2005 11:55 am Post subject: |
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first: per 1 L = 1 dm^-3
the rate law is gained by solving a differential equation, the chnage in concentration in time.
Last edited by sdekivit on Sun Oct 16, 2005 8:33 am; edited 1 time in total |
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RobJim
Senior Member
Joined: 13 Feb 2005
Posts: 320
Location: Los Angeles, CA
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| Posted: Sun Oct 16, 2005 5:21 am Post subject: |
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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.
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Mjhavok
Probably not a bot. Junior Member.
Joined: 14 Oct 2005
Posts: 3
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| Posted: Tue Oct 18, 2005 11:53 am Post subject: |
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Thanks alot guys,
This has helped.
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