04-02-2018, 04:26 PM

Confused on limiting reagent conceptually.

Ex.

http://www.csun.edu/~hcchm001/LIMITREG.pdf

equation 3H2 + N2 -> 2NH3

5g of H2 and 5g of N2

Then H2 = 2*1.01 and N2 = 2(14.01) and NH3 = 17.04

Cool.

But it's the next step I'm a bit confused about (finding the limiting reagent). The site described it as finding "g of product produced from each of the given amounts of reactant"

However this doesn't make sense to me. To make the product you needed both H and N yet we're not considering the N at the moment. Is another way to put the above is how much H2 was needed to make the product NH3?

If not, can someone describe this in simple terms? Another explanation I found was this:

"mole ratio between reactant and product to convert moles reactant to moles product"

And that sort of helped but this concept hasn't solidified and I'd really appreciate another explanation.

Ex.

http://www.csun.edu/~hcchm001/LIMITREG.pdf

equation 3H2 + N2 -> 2NH3

5g of H2 and 5g of N2

Then H2 = 2*1.01 and N2 = 2(14.01) and NH3 = 17.04

Cool.

But it's the next step I'm a bit confused about (finding the limiting reagent). The site described it as finding "g of product produced from each of the given amounts of reactant"

However this doesn't make sense to me. To make the product you needed both H and N yet we're not considering the N at the moment. Is another way to put the above is how much H2 was needed to make the product NH3?

If not, can someone describe this in simple terms? Another explanation I found was this:

"mole ratio between reactant and product to convert moles reactant to moles product"

And that sort of helped but this concept hasn't solidified and I'd really appreciate another explanation.