Write the balanced chemical equation.
Mg + 2HCl ==> H2 + MgCl2
Do you have a mass for Mg? If so, convert mass Mg to mols, convert mols Mg to mols H2 (it's a 1:1 reaction for Mg to H2), then convert mols H2 to volume knowing that at STP a mol of H2 gas occupies 22.4 L. If I have guess wrong about having a mass of Mg, please give more details about the problem.
how do I calculate pressure exerted by H2 in a Mg and HCl reaction? (weighing by redox)
3 answers
when I converted g to mols for Mg, I got 8.640, but it doesn't look right. original mass for Mg = .021g
It isn't. mols = g/atomic mass.
mols = 0.021/24.3 = ?? but you need to look up the atomic mass of Mg. Sometimes I don't remember that well.
mols = 0.021/24.3 = ?? but you need to look up the atomic mass of Mg. Sometimes I don't remember that well.
1 answer