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CBSE Class 11-science Answered

find mole fraction of NaOH and H2O in 2 molal of aq.NaOH  
Asked by anbuazhagudurai1 | 27 Jun, 2021, 03:15: PM
Expert Answer
Molality is defined as moles of solute per kg of solvent.
 
Number of moles of solute =2
Mass of solvent=1 Kg
 
It is aqueous solution, thus solvent will be water.
 
Moles space of space solvent equals 1000 over 18 equals 55.5 space moles

Mole space fraction space of space solute equals space fraction numerator 2 over denominator 57.5 end fraction equals 0.0347
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