Why a mixture of Carbon disulphide and acetone shows positive deviation from Raoult’s law? What type of azeotrope is formed by this mixture?
Intermolecular forces of attraction between carbon disulphide and acetone are weaker than the pure components.
Minimum boiling azeotrope at a specific composition.
Detailed Answer:
When carbon disulphide is added to the acetone, the dipolar interaction between molecule of solute solvent (A – B) than the respective interaction between solute-solute (A – B) and solvent – solvent (B – B) weakens, which leads to increase in vapour pressure. Hence, shows positive deviation in vapour pressure from Raoult’s Law. Minimum boiling azeotrope at a specific composition is formed by this mixture.
Minimum boiling azeotrope at a specific composition.
Detailed Answer:
When carbon disulphide is added to the acetone, the dipolar interaction between molecule of solute solvent (A – B) than the respective interaction between solute-solute (A – B) and solvent – solvent (B – B) weakens, which leads to increase in vapour pressure. Hence, shows positive deviation in vapour pressure from Raoult’s Law. Minimum boiling azeotrope at a specific composition is formed by this mixture.
Define azeotropes. What type of azeotrope is formed by positive deviation from Raoult’s law ?
Give an example.
What type of intermolecular attractive interaction exists in the pair of methanol and acetone ?
State Raoult’s law for a solution containing nonvolatile solute. What type of deviation from Raoult’s law is shown by a solution of chloroform and acetone and why?
State Henry’s law. What is the effect of temperature on the solubility of a gas in a liquid ?
Why a mixture of Carbon disulphide and acetone shows positive deviation from Raoult’s law? What type of azeotrope is formed by this mixture?
In a galvanic cell, the following cell reactions occurs:
E°cell = +1.56 V
(i) Is the direction of flow of electrons from zinc to silver or silver to zinc?
(ii) How will concentration of Zn²⁺ ions and Ag⁺ ions be affected when the cell functions?
Define the following terms :
(i) Molar conductivity (),
(ii) Secondary batteries.
State Henry’s law. What is the effect of temperature on the solubility of a gas in a liquid ?
Complete the following chemical equations :
(i) MnO₄⁻(aq) + S₂O₃²⁻(aq) + H₂O(l) →
(ii) Cr₂O₇²⁻(aq) + Fe²⁺(aq) + H⁺(aq) →
(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)