What is the molarity of a solution with 20 moles of salt (#NaCl#) in 10 liters of solution?

1 Answer
anor277
Mar 26, 2016

#"Molarity"="Amount of solute (moles)"/"Volume of solution (litres)"# #=# #(20*mol)/(10*L)# #=# #2*mol*L^-1#

Explanation:

Molarity is a measure of concentration, #"amount of substance (mol)"/"volume of solution (L)"#. The units of molarity are naturally #"moles per litre of solution"# #=# #mol*L^-1#.

To get the amount of substance dissolved in a given volume, all I have to do is multiply the concentration by volume, i.e. #mol*L^-1xxL# #=# #mol#.

If I take #1L# of your solution, how many moles of #NaCl# does it contain?

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