Question

Write the net ionic equations for the dissociation of each salt.

1. Pb(NO3)2

2. NaCl

3.Na3PO4

4. Na2CO3

5. NH4Cl

6. NaHCO3

7. CuSO4

Answer 1

1.  

When solid salt Pb(NO_​​​3 )₂ ​​​​​​dissolves, it dissociates into its constituent ions - Pb ²⁺ and NO_{​​​​​3} ^-. Since these ions go into solution, their state is (aq). The initial Pb(NO3)2 is solid.

Hence, the equation for its dissociation is :

Pb(NO_​​​3 )₂ (s) = Pb ²⁺ (aq)+ 2 NO_{​​​​​3} ^- (aq)

Similarly, the others are written :

NaCl (s) = Na ⁺  (aq) + Cl ^- (aq)

Na_{​​​​​3}​PO_​​4 (s) =  3 Na⁺ (aq)+ PO_{​​​​​4} ^3- (aq)

Na2CO3 ( s) = 2 Na+ (aq) + CO_{​​​​​3} ^2- (aq)

NH4Cl (s) = NH4 + (aq) + Cl - (aq)

NaHCO3 (s) = Na + (aq) + HCO3 - (aq)

CuSO4 (s) = Cu 2+ (aq) + SO4 2- (aq)