Answer to Question #159628 in General Chemistry for dale

Question

A solution prepared by adding a given mass of solute to 20 g of benzene freezes at temperature 0.384⁰C below the freezing point of pure benzene. The freezing point of solution prepared from the same mass of the solute and 20 grams of water freezes at -0.4185⁰C. Assume that the solute is undissociated in benzene solution, but is completely dissociated into ions in water solutions. How many ions results from the ionization of one molecule in water solutions?  

Answer 1

0.384=5.48×m

M=0.07

0.4185=1.82×m_h2o

0.23

0.23÷0.07

3

Solute : water

3 1