  # How To Calculate Limiting Reagent And Excess Reagent

How To Calculate Limiting Reagent And Excess Reagent. Begin with a balanced chemical equation and starting amounts for each reactant. To consume 1.5 mole of oxygen, (2×1.5)=3 moles of hydrogen will be required.

Write the balanced chemical equation for the chemical reaction. Calculate the mass of excess reactant used up. Limiting reactant are those compounds which are totally used up after completion of the chemical reaction and stop any further reaction.

### 20 Boys 'React' With 30 Girls 20 Couples And 10 Girls Are 'Left Over' (In Excess) The Boys Are The Limiting Reagent, They Determine The Number Of Couples That Can Be Formed, And The Girls Are In Excess.

So in this example hydrogen is the limiting reactant and. Convert mass of each starting reactants to moles. Then find out the limiting and excess reactant respectively.

### From The Above Calculation The Limiting Reactant And Excess Reactant Can Be Determined Easily.

If 10 g sucrose is reacted with 8g of oxygen. To find the amount of remaining excess reactant, subtract the mass of excess reagent consumed from the total mass of excess reagent given. Identifying limiting reactant and excess reactant is very important for a chemical reaction.

### Calculate The Mass Of Limiting Reactant Needed To React With The Unused Excess Reactant.

Calculate the mass of excess reactant used up. Molecular weight 169.9 g / mol. The final step to answer this question is to identify the excess reactant and calculate the amount of excess that’s left over after the reaction stops when all of the limiting reactant is used up.

### Whichever Reactant Gives The Lesser Amount Of Product Is The Limiting Reactant.

To find the amount of remaining excess reactant, subtract the mass of excess reactant consumed from the total mass of excess reactant given. Causey shows you step by step how to find the limiting reactant and excess reactant in a given reaction. Limiting reactant are those compounds which are totally used up after completion of the chemical reaction and stop any further reaction.

### Calculate The Moles Of Product From The First Reactant.

Calculate the moles of product from the second reactant. From the above calculation the limiting reactant and excess reactant can be determined easily. To consume 1.5 mole of oxygen, (2×1.5)=3 moles of hydrogen will be required.