58.5 g of NaCl and 180 g of glucose were separately dissolved in 1000 mL of water. Identify the correct statement regarding the elevation of boiling point (bp) of the resulting solutions.

Options

A. NaCl solution will show higher elevation of bp
B. Glucose solution will show higher elevation of bp
C. Both the solutions will show equal elevation of bp
D. The bp elevation will be shown by neither of the solutions

Answer

A

Explanation

Elevation in boiling point,
`DeltaT_(b)=ixxK_(b)xxm`
`"Molality of NaCl solution" =(n)/(W)xx1000=(1000)/(W_(H_(2)O))`
`"Molality of "C_(16)H_(12)O_(6)" solution "=(1000)/(W_(H_(2)O))`
Both solutions have same molality but valuesof van't Hoff factor (i) for NaCl and glucose are 2 and 1 , respectively. Hence, NaCl solution will show higher elevation in boiling point.