a) <span>Ca(OH)₂+2HNO₃→Ca(NO₃)₂+2H₂O</span>
Ca + 2OH + 2H + 2NO₃ → Ca + 2NO₃ + 2H2O
2OH + 2H → 2H₂O
b) <span>AlCl₃+3KOH→Al(OH₃)↓+3KCl </span>
<span> Al+3Cl + 3K + 3OH → Al(OH₃)↓ + 3K+ 3Cl</span>
<span> Al + 3OH → Al(OH₃)↓</span>
<span>
</span>
c) <span>K₂CO₃+2HCl→ 2KCl+ H₂O +CO₂↑</span>
<span> 2K+2CO₃+2H+2Cl → 2K+2Cl +H₂O+CO₂↑</span>
<span> 2CO₃+2H→H₂O+CO₂↑</span>
<span>
</span>
d) 3<span>MgSO₄+ 2K₃PO₄--> Mg₃(PO₄)₂+ 3K₂SO₄</span>
<span> 3Mg+3SO₄+6K+2PO₄→Mg₃(PO₄)₂+6K+3SO₄</span>
<span> 3Mg+2PO₄→Mg₃(PO₄)₂</span>
<span> </span>
<span> </span>