Question

2. For each of the salts below, indicate whether its water solution would be acidic, basic or neutral. Write an equilibrium equation for any reaction that may occur in water. Compound Acidic, basic, Write an equilibrium equation for any reaction that may Zn(HSO4)2 or neutral occur KNO2 Na2CO3 LiBr Na3PO4 Al(NO3)3 K2S Na2SO4 KNO3 FeCl NH4CI KCI

Answer 1

2. Salts in solution

Compound : Zn(HSO4)2

solution : acidic

Equations,

Zn(HSO4)2 <==> Zn2+ + HSO4-

HSO4- + H2O <==> SO4^2- + H3O+

Compound : KNO2

solution : basic

Equations,

KNO2 ---> K+ + NO2-

NO2- + H2O <==> HNO2 + OH-

Compound : Na2CO3

solution : basic

Equations,

Na2CO3 --> 2Na+ + CO3^2-

CO3^2- + H2O <==> HCO3- + OH-

Compound : LiBr

solution : neutral

Equations,

LiBr <==> Li+ + Br-

Compound : Na3PO4

solution : basic

Equations,

Na3PO4 ---> 3Na+ + PO4^3-

PO4^3- + H2O <==> HPO4^2- + OH-

Compound : Al(NO3)3

solution : neutral

Equations,

Al(NO3)3 ---> Al3+ + 3NO3-

Compound : K2S

solution : basic

Equations,

K2S ---> 2K+ + S^2-

S^2- + H2O <==> HS- + OH-

Compound : Na2SO4

solution : basic

Equations,

Na2SO4 ---> 2Na+ + SO4^2-

SO4^2- + H2O <==> HSO4- + OH-

Compound : KNO3

solution : neutral

Equations,

KNO3 ---> K+ + NO3-

Compound : FeCl3

solution : acidic

Equations,

FeCl3 + 3H2O <==> Fe(OH)3 + 3HCl

Compound : NH4Cl

solution : acidic

Equations,

NH4Cl ---> NH4+ + Cl-

NH4+ + H2O <==> NH3 + H3O+

Compound : KCl

solution : neutral

Equations,

KCl ---> K+ + Cl-

Salts of strong acid and strong base are neutral. Salts of weak base and strong acid are acidic in nature. Salts of weak acid and strong base are basic in nature.