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limiting reactant

Posted: Sun Oct 06, 2019 4:29 pm
by AMahadi
is the limiting reactant usually the one with the smallest number of moles? why or why not?

Re: limiting reactant

Posted: Sun Oct 06, 2019 4:42 pm
by Hannah Pham
Not always; you can typically determine the limiting reactant by determining which reactant produces the least amount of product.

Re: limiting reactant

Posted: Sun Oct 06, 2019 6:17 pm
by madawy
Unfortunately, you’d have to compare whether or not the amount of moles you have is greater than the amount of moles you need; sometimes you can get a hint from the ratios, but most of the time the stoichometric coefficients and the sheer amount are not enough to tell

Re: limiting reactant

Posted: Sun Oct 06, 2019 6:26 pm
by quresh3E
What is the best way to find the limiting reactant when all of the reactants have coefficients above 1?

Re: limiting reactant

Posted: Sun Oct 06, 2019 6:56 pm
by 105099972
Find the number of grams produced and compare it to the ratio of the product

Re: limiting reactant

Posted: Sun Oct 06, 2019 7:57 pm
by 305376058
The limiting reactant is not necessarily always the one with the smallest number of moles. To determine which reactant is limiting, you have to compare the moles of each reactant to the ratios in the balanced chemical equation.

Re: limiting reactant

Posted: Sun Oct 06, 2019 8:01 pm
by Aarushi Solanki 4F
It may be, but not always. You can calculate it by figuring out which amount would create the least moles of product.

Re: limiting reactant

Posted: Sun Oct 06, 2019 8:02 pm
by Kendra Barreras 3E
Not necessarily, you first would have to see which ratio you need using your balanced chemical equation and then convert the grams you were given into moles and see if it fits the ratio, you have. If it does not you have to check if it either has more or less than you need and evaluate from there.

Re: limiting reactant

Posted: Sun Oct 06, 2019 8:27 pm
by 005384106
I have found it easiest to find the limiting reactant by solving for how much product can be produced. This can be used by solving for the amount of moles there are of each reactant and using the molar ratio to solve for the grams of a product and whichever reactant produces the smaller amount of product that is your limiting reactant. Sorry for a confusing explanation.

Re: limiting reactant

Posted: Sun Oct 06, 2019 9:30 pm
by SimranSangha4I
Not necessarily, but the reactant with the smallest number of moles can be the limiting reactant if all reactants within the chemical equation react in a mole ratio of one to one.