Molar Mass Calculation: Unlocking the Mystery Compound
How can we determine the molar mass of a compound from its boiling point elevation?
Given Data: A solution containing 14.3 g of a molecular compound dissolved in 100.0 g of water has a boiling point of 101.5 °C. Calculate the molar mass of the compound. The Kb for water is 0.512 °C/m.
The molar mass of the compound can be calculated using the formula:
Molar mass of the compound = (boiling point elevation)/(molal boiling point constant)
Are you ready to unravel the mystery behind the molar mass of the compound in this exciting calculation? Let's dive in!
To determine the molar mass of the compound, we first need to calculate the boiling point elevation using the formula:
Boiling point elevation = Kb * molality * i
Calculate the molality of the solution:
molality = (mass of solute)/(mass of solvent in kg)
Now, plug in the given values:
Kb = 0.512 °C/m, boiling point elevation = 101.5 °C - 100.0 °C = 1.5 °C, and molality = (14.3 g)/(100.0 g/1000) = 143 mol/kg
Solve for the molar mass of the compound using the formula provided to uncover the identity of the mysterious compound!