An amount of sugar was added to water such that the boiling point of the water w

Question

An amount of sugar was added to water such that the boiling point of the water was raised to 106.1 degree C. What is the freezing point of the sugar solution? Calculate the volume of water that must be added to 422 mL of 6.8 M NaCl to make a solution that is 2.6 M in NaCI Calculate the pH of solutions having these H^+ concentrations: 0.0001 M 7.1 x 10^-5 M In a titration experiment, 13 mL or 5.5 M HCl neutralized 38 mL of a NaOH solution. Calculate the molarity of the NaOH What volume of 5.1 M sodium chloride contains 3.7 g of sodium chloride

Explanation / Answer

6)

Tb = 106.1

find freezing point

First, calculate molality

dTb = +K*m

(106.1-100) = 6.1

6.1 = K*m

for water

K = 0.512

then

6.1 = 0.512*m

m = 6.1/0.512 = 11.91

therefore

m = 11.91

then, go for freezing point

dTf = -K*m

K = 1.86 for water

dTf = -1.86*11.91

dTf = -22.15

then

Tf = 0-22.15 = -22.15ºC

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