当量计算器
计算物质在化学反应中的当量。
g/mol
Equivalent Weight
49.040 g/equiv
Equivalent Weight vs Molar Mass
公式
## How to Calculate Equivalent Weight ### Formula **Equivalent weight = Molar mass / n-factor** The n-factor depends on the reaction type (acid-base, redox, etc.).
计算示例
H2SO4 (98.08 g/mol) as a diprotic acid (n=2).
- 01Eq. weight = 98.08 / 2
- 02Eq. weight = 49.04 g/equiv
常见问题
What is equivalent weight?
The mass of a substance that reacts with or supplies one mole of reactive species (H+, OH-, or electrons).
How do I find the n-factor?
For acids: number of H+ donated. For bases: number of OH-. For salts in precipitation: total charge. For redox: electrons transferred.
Is equivalent weight still used?
Less so in modern chemistry, but it remains useful in titration calculations and water chemistry.
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