Question

What if I have 2.5 moles of magnesium and 2.5 moles of HCL, how many moles of hydrogen are formed?
My balanced equation is Mg + 2HCl ----> MgCl2 + H2

Answer 1

@chmvijay

Answer 2

Ok so my limiting agent is Mg?

Answer 3

1 mole of mg requires = 2 mole of HCl
2.5 moles of mg requires = 5 moles of HCl but you have only 2.5 moles of HCl
now u say the limiting agent

Answer 4

the limiting agent is HCI?

Answer 5

mean if 2.5 moles of Mg want to react completely it needs atleast 5 moles of HCl but in ur question they have given only 2.5 moles of HCl are there
now which is limiting agent

Answer 6

HCI because it limits you because you only have half of what you need correct?

Answer 7

right?

Answer 8

@chmvijay

Answer 9

yaaa correct :)

Answer 10

now proceed further

Answer 11

hello say something

Answer 12

sorry lost internet for a sec

Answer 13

so HCI is the limiting reactant which makes Mg the excess reactant

Answer 14

@chmvijay

Answer 15

@phi help a girl out?

Answer 16

@yrelhan4

Answer 17

anybody?

Answer 18

ok so I have the balanced equation, and I know the limiting and excess reactants, now am I suppose to find the moles of Mg, H, and CI?

Answer 19

use simply the unitary method.

the equation says, 2 moles of HCl produced 1 mole of H2
now, 1 mole of HCl will produce 0.5 mole of H2

now, 2.5 mole of HCl will produce 0.5 * 2.5 moles of H2. = 1.25moles.

i hope this helps,

Answer 20

So if I have 2.5 moles of magnesium and 2.5 moles of HCL, 1.25 moles of hydrogen are formed?

Answer 21

yes.!
acc to calculatins. this is the ans. i got!

Answer 22

ty!!!!!!!!!!!