4.70g of Na2SO4 is added to enough water to make 150.0mL of solution. What is the percent by mass of Na2SO4 of this solution? The density of the solution is 1.01g/mL.

1 Answer
Shubh
Apr 9, 2018

#mass % of Na_2SO_4=3.10%#

Explanation:

mass of #Na_2SO_4=4.7# gm
density of #sol^n#=1.01g/mL
volume of solution=150mL
so, by, #d=m/v#
#1.01=m/150#
#m=151.5# gm
now, #mass %=(mass_(solute))/(mass_(solution))*100#
=#4.7/151.5*100=3.10%#

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