🔋 Galvanic Cell Electrochemistry Simulator
ElectrochemistryWhat's happening? E°cell = E°cathode - E°anode. Electrons flow from anode (oxidation) to cathode (reduction) through the wire. Salt bridge completes the circuit.
Electrochemistry: 5-8 questions every year.
JEE tests cell potential, Nernst equation, conductivity, electrolysis.
Key formulas
Galvanic Cell Formulas
Cell potential
E_cell = E_cathode - E_anode
Oxidation at anode, reduction at cathode
Nernst
E = E - (0.059/n) log Q
At 25C
Gibbs
dG = -nFE
F = 96485 C/mol. dG<0 = spontaneous
Conductivity
k = 1/rho = L_m x c
Molar conductivity x concentration
Step-by-step problem solving
How to solve chemistry problems in JEE
- Identify anode (oxidation) and cathode (reduction)
- Look up E values
- E_cell = E_cathode - E_anode
- Nernst if non-standard
- dG = -nFE for spontaneity
Common JEE mistakes
What students get wrong
Anode vs cathode
Anode = oxidation (negative). Cathode = reduction (positive)
E_cell sign
E_cathode - E_anode, NOT sum
Nernst log vs ln
Use log at 25C, not ln
n = moles electrons
Count from balanced half-reactions, not substance moles
FAQs
Galvanic Cell Questions
Find cathode/anode?
Higher E = cathode. Lower E = anode. Must be positive for spontaneous.
Nernst tells what?
How concentration affects voltage. Q->K means E->0
E_cell negative?
Yes = non-spontaneous (electrolysis)
Calculate n?
Balance half-reactions, count electrons transferred