免费限量试剂计算器
确定化学反应中的限量试剂和过量试剂。
mol
mol
Moles/Coefficient for A
2.0000
Moles/Coefficient for B1.5000
Moles/Coefficient for A vs Moles of Reactant A
公式
## How to Find the Limiting Reagent ### Method Divide the moles of each reactant by its stoichiometric coefficient. The reactant with the **smallest ratio** is the limiting reagent. **Ratio = moles / coefficient**
计算示例
2 mol A and 3 mol B react with coefficients 1A + 2B.
- 01Ratio A = 2 / 1 = 2
- 02Ratio B = 3 / 2 = 1.5
- 03B has the smaller ratio, so B is the limiting reagent
常见问题
What is a limiting reagent?
The reactant that runs out first, determining the maximum amount of product that can form.
What happens to the excess reagent?
It is left over after the reaction completes. The remaining amount equals initial minus consumed.
Why compare ratios instead of moles?
Reactants are consumed in stoichiometric proportions, not 1:1. The ratio accounts for different coefficients.
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