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 ?
Calculate pH of following half-cell. Pt, \(H_2\) / \(H_2\)\(SO_4\) , if its electrode potential is 0.03V.
Calculate the molality of ethanol solution in which the mole fraction of water is 0.88.
State Henry’s law. What is the effect of temperature on the solubility of a gas in a liquid ?
Following reactions can occur at cathode during the electrolysis of aqueous silver nitrate solution using Pt electrodes:
(i) State the law which helps to determine the limiting molar conductivity of weak electrolyte.
(ii) Calculate limiting molar conductivity of CaSO₄ (limiting molar conductivity of calcium and sulphate ions are 119.0 and 160.0 Scm² mol⁻¹ respectively)
What are the transition elements ? Write two characteristics of the transition elements.
Define the following terms :
(i) Molar conductivity (),
(ii) Secondary batteries.