Hard chemistry question...?

Question

# 111)

consider the following reaction:

2Al (s) + 3H2SO4 (aq) --> Al2(SO4)3 (aq) + 3H2 (g)

What minimum volume of 4.0 M H2SO4 is required to produce 15.0 L of H2 at STP?

WHOA... Confusion... Please explain so I can understand in the future. Thanks much!!

Answer 1

i'm sorry i can't help u...!!!!

give me easy question...

Answer 2

As you can see by the reaction, 3 moles of H2SO4 leads to 3 moles of H2.

You need to know how many moles of H2 are in a L of gas at STP. You can assume H2 will act like or very similar to an ideal gas, so you'll have 22.4L/mol. Or the inverse, 0.045 mol/L.

Multiply that by your required 15 L of H2 to get 0.67.

That's how many mol of H2 you need. Since the reaction is 3-3 this is also how many mol of H2SO4 you need.

Divide this by 4 to get 0.17 and thats how many L of 4M H2SO4 you need.