Question

Buna. Scuz...am revenit.​

Answer 1

Răspuns:

a. 2HNO3 +3H2S=>3S+2NO+,4H2O

S-² - 6 e- => S⁴ (oxidare agent reducator)

2 N⁵ + 6 e- =>2 N² (reduction)

b.

4HNO3 +3C=> 3CO2+4N4O+2H2O

3 C⁰ - 12 e- =>3 C⁴(oxidare agent redactor

4 N⁵ + 12 e- => 4 N ² (reducere agent oxidant)

C.

SO2 +2CuCl2 +2H2O =>2CuCl + H2SO4 +2HCl

2 Cu² + 2 e- => 2 Cu¹ ( reducere agent oxidant )

S⁴ - 2 e- =>S⁶ (oxidareagent reducator )