How many moles of sodium chloride solute are in 155 grams of an 85.5 percent by mass solution?

1 Answer
anor277
Aug 22, 2016

#"% by mass"# #=# #"mass of solute"/"mass of solution"xx100%#

Explanation:

Thus if #"% by mass"=85%#, there are #85.5%xx155*g" solute"# in a solution whose mass is #155*g#.

#"Moles of NaCl"# #=# #(85.5%xx155*g)/(58.44*g*mol^-1)#

#=# #2.27*mol" with respect to NaCl"#.

This result makes no chemical sense at all inasmuch as I do not think you can prepare a solution of sodium chloride with that concentration. C'est la vie.

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