Molar concentration
From Free net encyclopedia
(Difference between revisions)
Current revision
Molar concentration is a measure of the concentration of a solution. It is defined as moles of solute per liter of solvent, and has units of mol dm-3.
<math>C=\frac{N/A}{V}</math>
Here, N is the number of molecules present in the volume. This latter is measured in liter (Not very S.I., but history rules). A is the Avogadro's number, 6.023 10-23
Let us take few example.
1-Most proteins are present in the bacteria E.Coli at 60 copies or fewer. The volume of the bacteria is 10-15 liter, which gives us C=10-7 M =100nM. (nM is nanomolar i.e. 10-9).
2- 2 grams of NaCl disolved in 5mL of Water. As 58 grams of NaCl is 1 A molecules, and 1mL is 0.001 liter, this gives C=(2/58)/0.005=6.9 M.
[edit]
See also
[edit]