电沉积质量计算器
根据法拉第定律计算电解沉积的质量。
Standard Cell Potential (E°cell)
1.10 V
Standard Cell Potential (E°cell) vs E° of Cathode (Reduction)
公式
## Standard Cell Potential ### Formula **E°cell = E°cathode − E°anode** Where: - **E°cell** = standard cell potential (V) - **E°cathode** = standard reduction potential of the cathode - **E°anode** = standard reduction potential of the anode Both values are entered as standard reduction potentials. The anode undergoes oxidation, so its reduction potential is subtracted. Positive E°cell means the reaction is spontaneous (galvanic cell).
计算示例
A Cu/Zn galvanic cell: Cu²⁺/Cu E° = +0.34 V (cathode), Zn²⁺/Zn E° = -0.76 V (anode).
- 01E°cell = E°cathode - E°anode
- 02E°cell = 0.34 - (-0.76)
- 03E°cell = 0.34 + 0.76
- 04E°cell = 1.10 V
常见问题
What does a positive E°cell mean?
A positive E°cell indicates a spontaneous reaction (ΔG° < 0). This is a galvanic (voltaic) cell that can produce electricity.
How do I identify cathode and anode?
The half-cell with the higher reduction potential is the cathode (reduction occurs). The lower one is the anode (oxidation occurs).
How is E°cell related to ΔG°?
ΔG° = -nFE°cell, where n is moles of electrons transferred and F = 96485 C/mol is Faraday's constant.
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