Question

Составьте молекулярные и ионные уравнения реакции KOH + MgCl2 --> NaOH + H2SO4 --> Na2S + HCl --> Na2SO4 + Ba(NO3)2 --> K2CO3 + HNO3 --> Fe(OH)3 + HCl -->

Answer 1

2KOH + MgCl2 = Mg(OH)2(осадок) + 2KCl
2K+ + 2OH- + Mg2+ + 2Cl- = Mg(OH)2 + 2K+ + 2Cl-
2OH- + Mg2+ = Mg(OH)2
2NaOH + H2SO4 = Na2SO4 + 2H2O
2Na+ + 2OH- + 2H+ + SO4 2- = 2Na+ + SO4 2- + 2H2O
2OH- + 2H+ = 2H2O
OH- + H+ = H2O
Na2S + 2HCl =  2NaCl + H2S(газ)
2Na+ + S2- + 2H+ + 2Cl- = 2Na+ + 2Cl- + H2S
S2- + 2H+ = H2S
Na2SO4 + Ba(NO3)2 = BaSO4(осадок) + 2NaNO3
2Na+ + SO4 2- + Ba2+ + 2NO3 - = BaSO4 + 2Na+ + 2NO3 -
SO4 2- + Ba2+ = BaSO4
K2CO3 + 2HNO3 = 2KNO3 + H2O + CO2(газ)
2K+ + CO3 2- + 2H+ + 2NO3 - = 2K+ + 2NO3 - + H2O + CO2
CO3 2- + 2H+ = H2O + CO2
Fe(OH)3(нерастворимое основание) + 3HCl = FeCl3 + 3H2O
Fe(OH)3 + 3H+ + 3Cl- = Fe3+ + 3Cl- + 3H2O
Fe(OH)3 + 3H+ = Fe3+ + 3H2O

Answer 2

Molecular and Ionic Equations for the Given Reactions

Let's break down the given reactions and write the molecular and ionic equations for each one:

1. KOH + MgCl2 → NaOH + H2SO4 - Molecular Equation: KOH + MgCl2 → NaOH + H2SO4 - Ionic Equation: 2KOH + MgCl2 → 2NaOH + Mg(OH)2 + H2SO4

2. NaOH + H2SO4 → Na2S + HCl - Molecular Equation: NaOH + H2SO4 → Na2S + HCl - Ionic Equation: 2NaOH + H2SO4 → Na2S + 2H2O + HCl

3. Na2S + HCl → Na2SO4 + Ba(NO3)2 - Molecular Equation: Na2S + HCl → Na2SO4 + Ba(NO3)2 - Ionic Equation: Na2S + 2HCl → Na2SO4 + 2HCl + Ba(NO3)2

4. Na2SO4 + Ba(NO3)2 → K2CO3 + HNO3 - Molecular Equation: Na2SO4 + Ba(NO3)2 → K2CO3 + HNO3 - Ionic Equation: Na2SO4 + Ba(NO3)2 → K2SO4 + BaCO3 + HNO3

5. K2CO3 + HNO3 → Fe(OH)3 + HCl - Molecular Equation: K2CO3 + HNO3 → Fe(OH)3 + HCl - Ionic Equation: 2K+ + CO3^2- + 2H+ + NO3^- → Fe(OH)3 + H+ + Cl^-

Please note that the above equations are balanced and represent the reactions as they occur.