ta co pthh Mg(NO3)2 + H2O \(\rightarrow\) MgO + 2HNO3
3 Al2(SO4)3 + 6 H2O \(\rightarrow\) 6AlO +6H2SO4
ta co nong do dd cua Al2(SO4)3= \(\dfrac{n}{v}\)\(\rightarrow\)nAl2(SO4)3= CM*V= 2.4* \(\dfrac{300}{1000}\)=0.72 mol
theo pthh nH2O= \(\dfrac{6}{3}\)nAl2(SO4)3= \(\dfrac{6}{3}\).0.72=1.44 mol
\(\Rightarrow\)VH2O= 1.44*22.4\(\approx\)32.26 l