Prove that depression in freezing point is a colligative property.

Show that elevation in boiling point is a colligative property.

What is depressant?

The depression in freezing point of water observed for the same amount of acetic acid, trichloroacetic acid and trifluoroacetic acid increases in the order given above. Explain briefly.

Define freezing point of a substance.

On dissolving 19.5g CH_2F COOH in 500g of water, a depression of 1^@C in freezing point of water is observed. Calculate the vant Hoff factor and dissociation constant of Fluoroacetic acid. (Given, K_f = 1.86 K kg mol^-1)

Why is osmotic pressure considered to be a colligative property?

Calculate the depression in freezing point of water when 20g of CH_3CH_2CHClCOOH is added to 500g of water. (Given Ka=1.4xx10^(-3)K_f=1.86 )

Calculate the depression in the freezing point of water when 10 g of CH_3CH_2CHClCOOH is added to 250 g of water. K_a = 1.4xx10^-3 , K_f = 1.86 K kg mol^-1 .

Suppose you are required to determine the molecular mass of a protein molecule. Which colligative property is suitable for this purpose? Write the necessary equation for the determination of molecular mass.

If the angle of elevation of a cloud from a point h metre above the lake is alpha and the angle of depression of its reflection in the lake is beta , prove that the height of the cloud above the lake is (h(tan beta+tan alpha))/(tan beta- tan alpha)