Question

Explain the difference between an electrochemical cell and electrolytic cell. State Kohlrausch's law and write its applications.

Hint:

Electrochemical cells generate electricity via redox reactions, whereas electrolytic cells drive non-spontaneous reactions using electrical energy.

Answer 1

Step 1: Difference Between Electrochemical and Electrolytic Cells:  Feature & Electrochemical Cell & Electrolytic Cell 
Energy Conversion & Chemical to electrical & Electrical to chemical 
Spontaneity & Spontaneous reaction & Non-spontaneous reaction 
Example & Galvanic/Daniel cell & Electrolysis of NaCl 
Step 2: Kohlrausch's Law: \[ \Lambda_m^0 = \lambda^0_+ + \lambda^0_- \] where \( \lambda^0_+ \) and \( \lambda^0_- \) are the limiting molar conductivities of cations and anions, respectively. 

Step 3: Applications: - Used to calculate the molar conductivity of weak electrolytes. - Helps in determining dissociation constants of weak acids and bases.