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#1
04-10-2010, 01:45 PM
 irenairena78 Junior Member Join Date: Apr 2010 Posts: 4 Rep Power: 0
conversion

Can someone convert me mg/l to mmol/l.Please give me the answer as soon as possible
Thank you
#2
04-10-2010, 04:02 PM
 JohnS Double Ultimate Supreme Member Join Date: Dec 2007 Location: SE Michigan, USA Posts: 8,705 Rep Power: 17
Re: conversion

Quote:
 Originally Posted by irenairena78 Can someone convert me mg/l to mmol/l.Please give me the answer as soon as possible Thank you
Sure, just divide by the molar mass in grams per mole. You have to know the substance and either look up its molecular weight or calculate it from chemical formula. The molecular weight is numerically equal to the molar mass in grams per mole. In general, it is unique to the substance.
#3
04-11-2010, 03:47 AM
 irenairena78 Junior Member Join Date: Apr 2010 Posts: 4 Rep Power: 0
Re: conversion

Thank you!
So,if I need to convert 220 mg/l CaCo3 to mmol/l it is gonna be 220mg/l * 100 g/mol*1g/1000mg.Is it ok my calculation?
#4
04-11-2010, 03:51 AM
 irenairena78 Junior Member Join Date: Apr 2010 Posts: 4 Rep Power: 0
Re: conversion

Sorry,as i can see i have to divide 220 mg/l with molar mass.So,220mg/l/100 g/mol*1g/1000mg cause i need mg.
#5
04-11-2010, 01:40 PM
 Mrs X can't count, can't spell! Join Date: Feb 2006 Location: New Zealand Posts: 2,294 Rep Power: 11
Re: conversion

Quote:
 Originally Posted by irenairena78 Sorry,as i can see i have to divide 220 mg/l with molar mass.So,220mg/l/100 g/mol*1g/1000mg cause i need mg.
220mg/L CaCO3 = 2.2mmol/L

For CaCO3, there are 100.1g/L for a 1M solution, there are 100.1mg/L for a 1mM solution.
#6
04-11-2010, 11:10 PM
 irenairena78 Junior Member Join Date: Apr 2010 Posts: 4 Rep Power: 0
Re: conversion

Thank you Mrs X

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