Question

dau test la chimie,va rog mult de tot
chiar am nevoie

Answer 1

Răspuns:

1) 2NaCl = 2Na + Cl2

2) Cl2 + H2 = 2HCl

3) 2Na + 2H2O = 2NaOH + H2

4) NaOH + HCl = NaCl + H2O

5) AgNO3 + HCl = AgCl(pp) + HNO3

6) 8HNO3 + 3Cu = 3Cu(NO3)2 + 4H2O + 2NO

7) Cu + HCl = nu reactioneaza

8) 2NaOH + 2Al + 6H2O = 2Na[Al(OH)4] + 3H2

9) Fe + Al2O3 = nu reactioneaza

10) Dar 2Al + Fe2O3 = Al2O3 + 2Fe

Redox reactia 6 :

N(+5) + 3e = N(+2) |*2

Cu(0) - 2e = Cu(+2) |*3

a = Cl2

b = Na

c = HCl

e = NaOH

f = H2

g = AgCl

j = HNO3

l = AgNO3

o = NO

v = Cu(NO3)2