Question

Calculate the freezing point of a solution containing 8.1 g of hbr in 100 g of water. 1 assuming the acid to be 90 % ionized given: molar mass br 80 g/mol, kf water = 1.86 k kg/mol]

Answer 1

ANSWER IS -3.53°C............

∝=0.90 AND ∝=i-1\l-1            and i=∝(m-1)+1⇒0.90(2-1)+1⇒1

now,

Δfreezing point= 1.9 * 1.86 * 1= 3.53    and as it is freezing point=0-Δfp

                                                                                = 0-3.53=-3.53