Question

Alege dintre substantele indicate in imaginea de mai jos perechi de substante care, in urma reactiilor dintre ele, sa conduca la obtinerea a doua baze solubile si a doua baze greu solubile.
Substantele: NaOH ; K ; HCl ; KOH ;$Li_{2} O$ ; NiCl$NiCl_{2}$ ;$H_{2} O$ ;$CuCl_{2}$ ;$H_{2}SO_{4}$.

Answer 1

doua baze solubile:

2K + 2H2O --> 2KOH + H2

Li2O + 2H2O --> 2LiOH + H2O

doua baze insolubile:

CuCl2 + 2NaOH --> Cu(OH)2↓ + 2NaCl

NiCl2 + 2KOH --> Ni(OH)2↓ + 2KCl