What is the molar concentration of a #2%("weight"/"volume")# solution of sodium hydroxide?

1 Answer
anor277
Jun 29, 2017

We assume that we deal with a #2%# #"weight"/"volume"# solution......

Explanation:

That is #2*g# of #"sodium hydroxide"# are dissolved in a #100*mL# volume of water........

#"Concentration"="Moles of solute"/"Volume of solution"#

#=((2.0*g)/(39.99*g*mol^-1))/(100*mLxx10^-3*L*mL^-1)=0.500*mol*L^-1#

Please note my assumption.......in questions of this kind normally the density of the solution would also be quoted.

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