CE TREBUIE SA STII:
pH=-lg[H⁺]---> [H⁺]=10la minus pH ; [H⁺][OH⁻]=10⁻¹⁴mol²/l²
pH+pOH=14
TOATE CONCENTRATIILE SE ADUC LA "MOL / L"
7.pH=3-->[H⁺]=10⁻³mol/l; [HO⁻]=10⁻¹¹mol/l--. 1000ml.......10⁻¹¹mol HO⁻
100ml........n= 10⁻¹²mol HO⁻
8. 10ml........10⁻⁶mol H3O⁺
1000ml......10⁻⁴mol-------> pH= 4
10. [HO⁻]=[NaOH]=10⁻¹mol/l pOH=1---> pH=13
9. ESTE MAI GREA !
100(ml) apa....112mgKOH......112mg/56mg/mmol=2mmol
200ml sol.........2mmolKOH......2mmol OH⁻
1000ml................................20mmol=.0,02mol OH⁻---> pOH=2-->pH= 12
