CTTQ: A2Ox
A2Ox +xH2SO4 --> A2(SO4)x + xH2O(*)
giả sử nA2Ox=1(mol)
=>mA2Ox=2MA+16x(g)
theo(*) : nH2SO4=x.nA2Ox=x(mol)
=>mdd H2SO4=\(\dfrac{98x.100}{14}=700x\left(g\right)\)
nA2(SO4)x=nA2Ox=1(mol)
=>mA2(SO4)x=2MA+96x(g)
=>\(\dfrac{2MA+96x}{2MA+16x+700x}.100=16,2\)
=>MA=12x(g/mol)
xét : => A=Mg, A2On:MgO