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The only way I know to find the limiting reagent is to do the picket fences and see how much of the product is produced from each separate reactant. However, it does get kind of confusing. Is there any other way to find the limiting reagent that is more straight forward/ easier?
I also believe that is the most straight forward way. I think a good way to help you process limiting reagent problems is to list what you're given and what you're trying to find. Then compare to see which reactant produces the least amount of product which means that specific reactant is what's limiting the reaction from going into completion.
If given the grams of reactants, you can technically convert each reactant to moles and then convert one of the reactants to moles of the other reactant and use the coefficients in the chemical equation to determine the limiting reactant. So for instance, if you have 2H2 + O2 --> 2H2O and you find that you have 3 moles of H2 and 1 mole of O2, you'd use the equation and determine that the O2 was the limiting reagent because the molar ratio in the chemical equation is 2 mole of H2 to 1 mole of O2. I don't know if that's easier necessarily, but it is technically another way that you could calculate limiting reagents.
I think this is the best way to do it since many problems ask you how much product will be formed anyway, so you're essentially answering that question while you determine the limiting reactant. Just convert moles of each reactant to moles of the product you'll be looking for.
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