## Photon336 one year ago If the boiling point constant of water is 0.5 C/m what is the approximate boiling point of 2m solution of magnesium chloride? Answers in Celsius 101.5 98.5 97.0 103.0

1. Photon336

$MgCl _{2} --> Mg ^{+} + 2Cl ^{-}$ one mole of Magnesium ions 2 moles of chlorine ions. 1+2 = 3 moles of ions i = 3. m = molality moles/kg solvent. 2 $iK _{b} \Delta T$ $3*0.5\frac{ C}{ m }*2m = 3C = \Delta T$

2. Photon336

$\Delta T = t _{f}-t _{i}$ boiling point is 100C so we know that the boiling point had to have been raised over that by some amount. $\Delta T + Ti = Tf$ $3C + 100 = 103 C$