Explain the solubility rule “like dissolves like” in terms of intermolecular forces that exist in solutions.
A substance (solute) dissolves in a solvent if the intermolecular interactions are similar in both components. For example : polar solutes dissolve in polar solvents and non-polar solutes in nonpolar solvents thus we can say “like dissolves like”.
Calculate the molality of ethanol solution in which the mole fraction of water is 0.88.
What type of intermolecular attractive interaction exists in the pair of methanol and acetone ?
Explain the solubility rule “like dissolves like” in terms of intermolecular forces that exist in solutions.
Describe the oxidising action of potassium dichromate and write the ionic equations for its reaction with (i) an iodide (ii) H₂S.
The conductivity of 0.20 M solution of KCl at 298 K is 0.025 Scm⁻¹. Calculate its molar conductivity.
State Raoult’s law. How is it formulated for solutions of non-volatile solutes ?
Calculate the degree of dissociation (α) of acetic acid if its molar conductivity () is 39.05 Scm² mol⁻¹. Given (H⁺) = 349.6 Scm² mol⁻¹ and (CH₃COO⁻) = 40.9 Scm² mol⁻¹..
State Kohlrausch law of independent migration of ions. Why does the conductivity of a solution decrease with dilution ?
What is meant by ‘disproportionation’ ? Give an example of a disproportionation reaction in aqueous solution.