Question

Please check to make sure each of the following reactions is correct (with correct charges and coefficients!). Also, please identify any amphoteric ions in the equations.

CuSO₄(aq) + 2HCl(aq) =CuCl₂(aq) + H₂SO₄(aq)

CuCl₂(aq) + H₂O(aq) = [Cu(H₂O)₂Cl₂](aq)

CoCl₂(aq) + 2HCl(aq) =CoCl₄^2-(aq) + H₂(g)

CoCl₄^2-(aq) + 6H₂O =Co(H₂O)₆²⁺+ 4Cl^-(aq)

Ni(NO₂)₂(aq) + 2H₂O(aq) =Ni(OH)₂(aq) + 2HNO₂(aq)

CuSO₄(aq) + 2NaOH(aq) =Na₂SO₄(aq) + Cu(OH)₂(s)

KSCN(aq) + CuSO₄(aq) =KSO₄(aq) + CuSCN⁺(aq)

CuSCN⁺(aq)+ 2NaOH(aq) =Cu(OH)₂(s)+ 2Na⁺(aq) + SCN^-(aq)

CuSO₄(aq) + Na₂C₄H₄O₆(aq) =CuC₄H₄O₆(s) + Na₂SO₄(aq)

NaOH(aq) + CuSO₄(aq) =Cu(OH)₂(s) + Na₂SO₄(aq)

NiCl₂(aq) + 6 NH₄OH(aq) =6 H₂O(aq)  + [Ni(NH₃)₆]Cl₂(aq)

2NaOH(aq) + NiCl₂(aq) + 2KSCN(aq)=2NaSCN(aq) + Ni(OH)₂(s) + 2KCl(aq)

NiCl₂(aq) + Na₂C₂O₄(aq) =NiC₂O₄(aq) + 2NaCl(s)

NiCl₂(aq) + 2NaOH(aq) = 2NaCl(s) + Ni(OH)₂(aq)

CoCl₂(aq) + 2NH₄OH(aq) =Co(OH)₂(aq) + 2NH₄Cl(s)

Co(OH)₂(aq) + 2NaOH(aq) =Na₂[Co(OH)₄](s)

CoCl₂(aq) + KSCN(aq) = CoSCN(aq)  + KCl₂(aq)

KCl₂(aq) + NaOH(aq) = NaCl₂(s) + KOH(aq)

CoCl₂(aq) + 2NaOH(aq) = Co(OH)₂(aq) + 2NaCl(aq)

CoCl₂(aq) + Na₂C₄H₄O₆(aq)= CoC₄H₄O₆(aq) + 2NaCl(aq)

CoC₄H₄O₆(aq) + 2NaOH(aq) =Co(OH)₂(s) + Na₂C₄H₄O₆(aq)

Answer 1

The following reactions are corrected:

2KSCN (aq) + CuSO4 (aq) =K2SO4 (aq) + Cu(SCN)2 (aq)

2 NaOH (aq) + CuSO4 (aq) =Cu(OH)2 (s) + Na2SO4 (aq)

CoCl2 (aq) + 2 KSCN (aq) = Co(SCN)2 (aq)  + 2 KCl (aq)

KCl (aq) + NaOH (aq) = NaCl (s) + KOH (aq)

Amphoteric ions:

Ions behaving as both acids and bases. Eg: HCO₃^-, HSO₄^- etc.

Here in these equations no amphoteric ions are present.