A solution containing 8 g of a substance in 100 g of diethyl ether boils at 36.86^(@)C, whereas pure ether boils at 35.60^(@)C. Determine the molecular mass of the solute (For ether K_(b)= 2.02 K kg mol ^(-1))

A solution containing 8 g of a substance in 100 g of diethyl ether boi

1.	A solution containing 8 g of a substance in 100 g of diethyl ether boils at 36.86^(@)C, whereas pure ether boils at 35.60^(@)C. Determine the molecular mass of the solute (For ether K_(b)= 2.02 K kg mol ^(-1))
Answer» <html><body><p></p><a href="https://interviewquestions.tuteehub.com/tag/solution-25781" style="font-weight:bold;" target="_blank" title="Click to know more about SOLUTION">SOLUTION</a> :We have, mass of <a href="https://interviewquestions.tuteehub.com/tag/solute-1217068" style="font-weight:bold;" target="_blank" title="Click to know more about SOLUTE">SOLUTE</a>,` W_(2)=8g` <br/> Mass of solvent, `W_(1) = 100 g `<br/> Elevation of boiling point, `Delta T_(b) = 36.86 - 35.60=1.26 ^(@)C` <br/> `K_(b)=2.02` <br/> Molecular mass of the solute `M _(2) = ( <a href="https://interviewquestions.tuteehub.com/tag/1000-265236" style="font-weight:bold;" target="_blank" title="Click to know more about 1000">1000</a> xx W_(2) xx <a href="https://interviewquestions.tuteehub.com/tag/k-527196" style="font-weight:bold;" target="_blank" title="Click to know more about K">K</a> _(b))/(Delta T_(b) xx W_(1))= (1000 xx <a href="https://interviewquestions.tuteehub.com/tag/8-336412" style="font-weight:bold;" target="_blank" title="Click to know more about 8">8</a> xx 2.02)/(1.26 xx 100) = (161.6)/(1.26)` <br/> `= 128.25 g mol ^(-1).`</body></html>