When solute 'A' dissolves in a solvent, the solution becomes hot and when solute 'B' dissolves in the same solvent, the solution becomes cold. Classify the two changes as exothermic and endothermic. Give reason to support your answer.
Answers
:- State the principle of superposition of charges. Hence, express the force on a charge q due to discrete distribution of n charges in terms of their position vector.
Answer:
Dissolution is the process where a solute in gaseous, liquid, or solid phase dissolves in a solvent to form a solution.
Solubility
Solubility is the maximum concentration of a solute that can dissolve in a solvent at a given temperature. At the maximum concentration of solute, the solution is said to be saturated. The units of solubility can be provided in mol/L or g/L.
Factors that affect solubility include:
The concentration of the solute
The temperature of the system
Pressure (for gases in solution)
The polarity of the solute and the solvent
Fundamentals
Dissolution
The rate of dissolution is represented by the Noyes-Whitney equation: dm/dt = D*A*(Cs - C)/h
Where:
dm/dt represents the rate of dissolution
D represents the diffusion coefficient for the compound
A represents the surface area available for dissolution
Cs represents the solubility of the compound
C represents the solute concentration in bulk solution at time t
h represents the thickness of the dissolution layer
Explanation:
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