Question

Egalati prin metoda redox urmatoarele ecuatii :
1.HNO3+S=SO2+NO+H2O
2.CuO+C=Cu+CO2

Answer 1

Răspuns:

1. 4HNO3+3S=> 3SO2+4NO+2H2O

S⁰-4e=>S⁴oxidare agent reducator ×3

N⁵+3e=>N² reducere agent oxidant×4

3S⁰-12e=>S⁴

4N⁵+12e=<4N²

2. 2CuO+C=> 2Cu+CO2

Cu²+2eCu⁰reducere agent oxidant

C⁰-2e=>C⁴oxidare agent reducator