How do we specify a concentration, given #0.02*mol# of calcium chloride dissolved in a volume of water?

1 Answer

Answer:

This question is ill-proposed...........

Explanation:

I could have a #1*L# volume of #0.02*mol*L^-1# of #CaCl_2# containing #0.02*mol# #CaCl_2#;

I could have a #10*L# volume of #0.02*mol*L^-1# of #CaCl_2# containing #0.2*mol# of #CaCl_2#;

I could have a #100*L# volume of #0.02*mol*L^-1# of #CaCl_2# containing #2.0*mol# of #CaCl_2#.

Can you work out the MASS of solute in each solution?

When we specify a concentration we refer to the quotient.......

#"Moles of solute"/"Volume of solution"#, and thus #"concentration"# typically has the units #mol*L^-1#.