Calculatethe freezing pointto be 90 % ionized.of a solution containing

1.	Calculatethe freezing pointto be 90 % ionized.of a solution containing 8.1 g of HBr in 100 g of water, assuming the acid
Answer» molar mass of HBr = 81 g => number of moles of HBr in 8.1 hm = 8.1/81 = 0.1 moles. HBr ⇔ H⁺ + Br⁻ Hence, i = 1 + (2-1)x0.9 = 1.9 We know that, ΔT = i x Kf x 1000 x m/w = 1.9 x 1.86 x 1000 x 0.1/100 = 3.53 => Freezing point = 0 - 3.53 = -3.53⁰C Hence freezing point of the solution will be -3.53⁰C

Calculatethe freezing pointto be 90 % ionized.of a solution containing 8.1 g of HBr in 100 g of water, assuming the acid

Answer»

molar mass of HBr = 81 g

=> number of moles of HBr in 8.1 hm = 8.1/81 = 0.1 moles.

HBr ⇔ H⁺ + Br⁻

Hence,

i = 1 + (2-1)x0.9 = 1.9

We know that,

ΔT = i x Kf x 1000 x m/w

= 1.9 x 1.86 x 1000 x 0.1/100

= 3.53

=> Freezing point = 0 - 3.53

= -3.53⁰C

Hence freezing point of the solution will be -3.53⁰C