b) n\(_{Al\left(OH\right)3}=0,2\left(mol\right)\)
Al(OH)3 + NaOH--->NaAlO2 +2H2O
Ta có
n\(_{NaOH}=0,05.2=0,1\left(mol\right)\)
=> Al(OH)3 dư
Theo pthh
n\(_{NaAlO2}=n_{NaOH}=0,1\left(mol\right)\)
m\(_{NaAlO2}=82.0,1=8,2\left(g\right)\)
a) 2Al(OH)3 +6HCl--->2AlCl3 +3H2O
Ta có
n\(_{Al\left(OH\right)3}=\)\(\frac{31,2}{78}=0,4\left(mol\right)\)
n\(_{HCl}=0,6.1,5=0,9\left(mol\right)\)
=> Al(OH)3 dư
Theo pthh
n\(_{AlCl3}=n_{Al\left(OH\right)3}=0,4\left(mol\right)\)
m\(_{AlCl3}=0,4.133,5=53,4\left(g\right)\)
Chúc bạn học tốt
a) n\(_{Al\left(OH\right)3}=\frac{31,2}{78}=0,4\left(mol\right)\)
=> n\(_{Al\left(OH\right)2}tg=0,4:2=0,2\left(mol\right)\)
2Al(OH)3 +6HCl---->2AlCl3 +3H2O
Ta có
n\(_{HCl}=0,6.1,5=0,9\left(mol\right)\)
=> HCl dư
Theo pthh
n\(_{AlCl3}=n_{Al\left(OH\right)2}=0,2\left(mol\right)\)
m\(_{AlCl2}=0,2.133,5=26,7\left(g\right)\)