Question

What is the limiting reactant when 5.6 moles of aluminum react with 6.2 moles of water? (4 points)

Unbalanced equation: Al + H2O → Al2O3 + H2

Answer 1

@pooja195

Answer 2

You need to calculate how much aluminum you have and how much oxygen from the water you have.

Answer 3

Can you do that?

Answer 4

I don't think so. Is it the same as the last problem?

Answer 5

yea its similar

Answer 6

Balanced Equation: 2Al + 3H2O → Al2O3 + 3H2
5.6 mol Al x 3 mol H2 / 2 mol Al = 8.4 mol H2
6.2 mol H2O x 3 mol H2 / 3 mol H2O = 6.2 mol H2 = Lower number, so H2O is limiting reactant

Answer 7

Please explain.

Answer 8

I remember having to find the low number, but I don't recall how that works.

Answer 9

The number of molecules on the work come from the numbers used to balance the equation, just plug them in. The lowest number is the limiting reactant also means over such as :
3 mol H2
------------
2 mol Al

Answer 10

http://openstudy.com/study#/updates/52a7d0cbe4b0d967b9d1f768
look at this its less confusing

Answer 11

How is this conceived? Al: 5.6/2 = 2.8

H2O: 6.2/3 = 2.1

Answer 12

6.2/3 isn't 2.1

Answer 13

your right the person made a mistake sorry about that :(

Answer 14

However, it is still lower than Al, so it would be correct. Can you explain to me why you third H2o but half Al?

Answer 15

im equally confused at you are now sorry i know its H2O

Answer 16

I'm questioning the fact that you divide H2o by 3, but do differently to Al.

Answer 17

@pooja195

Answer 18

I have received the correct answer. Thanks again. I have yet one last question that you may assist me with, then I shall let you alone. Will you attend?

Answer 19

lol yeah