What is the mass of the solute in 250 mL of 0.0520 M #NaOH# solution?

1 Answer
Jun 16, 2016

Answer:

#"Moles of solute"="Volume"xx"Concentration"#;

#"Mass of solute"="Moles"xx"Molar mass".#

Explanation:

This relationship is clear dimensionally.

So #"moles of solute "=#

#250*mLxx10^-3L*mL^-1xx0.0520*mol*L^-1#

#=0.0130*mol#

We have #0.0130*mol# sodium hydroxide.

The mass of caustic soda is simply this quantity mulitiplied by the molar mass of caustic:

#0.0130*molxx40.00*g*mol^-1# #=# #??g#