Al + MnO2 --> Al2 O3+ Mn Balance this euation?
回答 (2)
2016-07-08 6:57 pm
Balanced equation : a Al + b MnO₂ → c Al₂O₃ + d Mn
No. of Al in reactants = No. of Al in products
a = 2c
c = a/2
No. of O in reactants = No. of O in products
2b = 3c
2b = 3(a/2)
b = 3a/4
No. of Mn in reactants = No. of Mn in products
b = d
d = 3a/4
a : b : c : d
= a : (3a/4) : (a/2) : (3a/4)
= 1 : (3/4) : (1/2) : (3/4)
= (4/4) : (3/4) : (2/4) : (3/4)
= 4 : 3 : 2 : 3
Balanced equation : 4 Al + 3 MnO₂ → 2 Al₂O₃ + 3 Mn
No. of Al in reactants = No. of Al in products
a = 2c
c = a/2
No. of O in reactants = No. of O in products
2b = 3c
2b = 3(a/2)
b = 3a/4
No. of Mn in reactants = No. of Mn in products
b = d
d = 3a/4
a : b : c : d
= a : (3a/4) : (a/2) : (3a/4)
= 1 : (3/4) : (1/2) : (3/4)
= (4/4) : (3/4) : (2/4) : (3/4)
= 4 : 3 : 2 : 3
Balanced equation : 4 Al + 3 MnO₂ → 2 Al₂O₃ + 3 Mn
2016-07-08 7:15 pm
4Al + 3MnO2 --> 2Al2O3 + 3Mn
收錄日期: 2021-04-18 15:13:48
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