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100p urgenttttttttttttttttttttttt ex 2,5​

100p Urgenttttttttttttttttttttttt Ex 25 class=

Răspuns :

Răspuns:

Ex 2  

1) 2Al2O3=> 4Al + 3O2

2) 2Al+3Cl2=>2AlCl3

3)4Al+3O2=>2Al2O3

4)Al2O3+6HCl =>2AlCl3+ 3H2O

5)AlCl3+3NaOH=>Al(OH)3+3NaCl        

6)Al(OH)3+3HCl=>AlCl3+3H2O

7)2Al(OH)3+Na2CO3=>2NaAlO2+3H2O+CO2    

EX5      

 

Explicație:

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