Physical Chemistry Answers

Phenol and water form non-ideal liquid mixtures. When 7.32g of phenol and 7.95g of water are mixed together at 60°C they form two immiscible liquid phases with mole fractions of phenol of 0.042 and 0.161. (i) Calculate the overall mole fraction of phenol in the mixture. (ii) Use the lever rule to determine the relative amount of the two phases. Hint: the relative positive of mole fractions can be used to compute the needed distances in the lever rule.

The osmotic pressure of an aqueous solution at 330. K is 115 kPa. Estimate the freezing point of the solution. (The freezing-point constant of H2O is 1.86 K·kg·mol−1. Assume the mass density of H2O is 1000. kg·m−3.)

the solubility of calcium phosphate is 7.7x10\'-4 g/dm\'3 at 25\'C calcutate the solubility product at this temparature

0.15g of purified protein os dissolved in water to give 2.0ml of solution. The osmotic pressure is found to be 8.6torr at 25 degrees Celsius. Calculate the molecular mass of the protein

Define molar and equivalent conductance of a solution .

Distinguish between fluorescence and phosphorescence .

Mention the names of crystal system which has (i) four bravais lattices , and (ii) unequal sides and unequal angles and no angle equal to 90° .

Calculate the hydroxide Ion concentration of an aqueous solution having pH 4 .

Distinguish between physisorption and chemisorption .