Question

1. The reaction between hydrogen and oxygen is shown below. In an experiment, 1.0 mole of hydrogen and 1.0 mole of oxygen are introduced in a reaction vessel. What is the limiting reactant?

2H2(g) + O2(g) → 2H2O(g)

A. O2

B. H2

Answer 1

H2 molecular mass is 2.01588 and coefficient is 2. O2 mass is 31.9988 and coefficient is 31.9988. I think take the moles of each substance and divide it by the coefficient of the balanced equation. The substance that has the smallest answer is the limiting reagent.

Answer 2

@SapphireMoon So in this case the answer would be B. H2?

Answer 3

Yep. Since you only have 1 mol of each, and it takes 2 mol of hydrogen for every 1 mol of oxygen, you're going to run out of hydrogen first.

Answer 4

A general formula for finding limiting reactants is to divide the number of moles of something you have by it's coefficient in the balanced equation. What ever number is smallest is the limiting reactant (and the number of moles of the other reactants that you're going to use).

Answer 5

2 mole hydrogen -----> 1 mole oxygen
1 mole hydrogen -----> 0.5 mole oxygen

But we r given 1 mole of oxygen I.e; oxygen is in excess.

Answer 6

The limiting reagents are the reactants which are present in limited amount

So what do u think, which of these 2 reactants is limiting reagent