Please give me answers with explanations for these reaction equations. t) 0.2 M

Question

Please give me answers with explanations for these reaction equations. t) 0.2 M Cuso+1.0 M NH, observations: Balanced Molecular EquationA504 Ionic EquationSh Net Ionic Equation Co ( cm2 ? t nta rmed a solid then it dissappeared: dissolving ppt with XS NH, complex in u) 0.2 M Pb(NO2)2 +1.0 M NaOH observations: Balanced Molecular EquationW Ionic Equation Net Ionic Equation li 1 20 notice that in one direction you momentarily formed a solid then it dissappeared dissolving Ppt with XS OH': p;( ^ ?), /5) complex ion

Explanation / Answer

CuSO4 (aq) +4NH3 (aq) - - - > Cu[(NH3)4]SO4(aq)

Ionic equation - Cu2+ + SO4 2- +4NH3 - - - >Cu[(NH3)4]+SO4 2-

Net ionic equation - Cu2+ + 4NH3(aq) --> [Cu(NH3)4]^2+ ...... SO4^2- is a spectator ion

Explaination : when ammonia solution is added to solution of copper first we start to observe gelatinous blue solid forming. It consist insoluble copper hydroxide. OH- comes from base solution of ammonia. When more NH3 is added ppt of CuOH dissolves and more [Cu(NH3)4]^2+ is produced.

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