Finding LR

[Katie 3H]

Also, when we find the amount of each product(in moles) and then we are given an equation; which one are we assuming is correct to find the lr? We have to compare the equation to the moles we find but do we assume the reaction is supposed to go the way the equation states or the way our numbers (found or given) state?

[Crystal Ros 2L]

When finding the limiting reactant, it is more common to see questions that give us the amount, in grams or otherwise, of each reactant. In this case, we would convert to moles and then use the molar ration to determine which of the reactants is limiting the equation. Then, using this, we would calculate the theoretical yield of the products. If I am remembering correctly, I don't recall many practice problems solely giving us the product masses as the only given information. If there were, then I am also slightly concerned about how to go backwards on that type of problem as well.

[Neha Mukund]

Whenever given an equation and asked to state the Limiting Reactant, I always look at the mole-to-mole ratios of the reactants and determine which has less, which would then give one the limiting reactant.