[hóa 9] hcvc

L

luffy06041997

n HCl=0.95 g --> n HCl=0.3 mol
pt
A2O3 + 6HCl ---->2ACl3 + 3H2O
0.05.... 0.3
ta có n A2O3=0.05 ---> MA2O3=102 --->A=27 --> A là Al
 
U

ulrichstern2000

mHCl = 10,95(g) => nHCl = 0,3 (mol)
PTHH:
A2O3 + 6HCl → 2ACl3 + 3H2O
0,05////0,3
=> nA2O3=5,1/(2A+16*3)=0,05
\Rightarrow 2A + 48 = 102 => A = 27 => Al2O3
 
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