Answer to Question #251668 in General Chemistry for jhon

General Chemistry

Question #251668

A solution is made by dissolving 1.25 grams of Na2SO4 in 65.0 grams of water. What is the mole fraction of solute?

Expert's answer

2NaOH+H2SO4→Na2SO4+2H2O

= 65/18 = 3.61moles

125/142 = 0.88M

Total moles = 4.91

H₂O = 3.61/4.91

= 0.74

Na2SO4 = 0.88/4.91

= 0.179

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