What is the boiling point elevation when ammonia (NH3) is dissolved in water to form a 3.5 molal solution? Kb for water is 0.52 °C / m.

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22-09-2017
Chemistry

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What is the boiling point elevation when ammonia (NH3) is dissolved in water to form a 3.5 molal solution? Kb for water is 0.52 °C / m.

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laurenascough laurenascough · Answer 1 · 2017-09-22T12:45:59+02:00

laurenascough laurenascough

22-09-2017

No. of moles of ammonia: 11.4/(14+3) = 0.671mol
molality of solution: 0.671/0.2 = 3.35mol/kg
Change in temp: Kb x molality = 0.52x 3.35=1.74

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