What is the molarity of a solution made by dissolving 67.3 g of lithium chloride in enough water to make 2.37 l of solution?

Question

8587 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2018-03-20T06:37:32

#"0.670. M"#.

Molarity can be expressed like this:

#"molarity" = "number of moles"/"volume (L)"#

We know the volume, which is #"2.37 L"#, but we need to find the number of moles. We can do this by dividing #"67.3 g"# by the molar mass of #LiCl#:

#"number of moles" = "mass of sample"/"molar mass"#

#"number of moles" = "67.3 g"/"(6.94 + 35.45) g/mol" = "67.3 g"/"42.39 g/mol"#

#"number of moles = 1.59 mol"#

#"molarity" = "1.59 mol"/"2.37 L" = "0.670. M"#