Write the molecular and ionic equations for the reactions between nitric acid and calcium hydroxide

Write the molecular and ionic equations for the reactions between nitric acid and calcium hydroxide; copper (II) oxide; barium carbonate; mercury. For the last equation, draw up an electronic balance.

№1.

Cа(OH)₂ + 2HNO₃ = Cа(NO₃) ₂+ 2H₂O.

Cа ²⁺+2OH^1- + 2H¹⁺+ 2NO₃^1- = Cа²⁺ + 2NO₃^1-+ 2H₂O.

2H¹⁺ + 2OH^1- = 2H₂O.

№2.

CuO + 2HNO₃ = Cu(NO₃) ₂+ 2H₂O.

CuO + 2H¹⁺+ 2NO₃^1- = Cu²⁺ + 2NO₃^1-+ 2H₂O.

CuO+ 2H¹⁺ = Cu²⁺ + 2H₂O.

№3.

ВаСО₃  +2HNO₃ = Ва(NO₃) ₂+ СО₂↑ + 2H₂O.

Ва²⁺ +СО₃^2-  +2H¹⁺ + 2NO₃^1- = Ва²⁺ + 2NO₃ ^1-+ СО₂↑ + 2H₂O.

2H¹⁺ + СО₃^2-  =  СО₂↑ + 2H₂O.

№4.

Hg⁰ + 4HN⁺⁵O_3(конц)  = Hg ⁺²(NO₃)₂  + 2N⁺⁴О₂↑ + 2H₂O.

Hg0 -2e → Hg +2 │1 reducing agent, oxidizes.

N + 5 + 1e → N + 4 │ 2 oxidizing agent, reduced.