A set of metallurgical and redox reactions are listed below. Determine the total of all oxidation states of the different metallic elements present in the final products of these processes: Zn + NaOH(

Question

A set of metallurgical and redox reactions are listed below.

Determine the total of all oxidation states of the different metallic elements present in the final products of these processes:

Zn + NaOH(aq), Cu + dil. H₂SO₄, FeS₂ + O₂(excess), AgNO₃ (calcination),

Molten Al₂O₃ (electrolysis), Au + O₂ + KCN(aq)

Calculate the final numerical value.

TestHub · Accepted Answer

products is: Z n + N a O H → N a 2 ​ Z n O 2 ​ + H 2 ​ : N a = + 1 , Z n = + 2 C u + d i l . H 2 ​ S O 4 ​ → N ore a c t i o n : C u = 0 F e S 2 ​ + O 2 ​ ( e x cess ) → F e 2 ​ O 3 ​ + S O 2 ​ : F e = + 3 A g N O 3 ​ Δ ​ A g + N O 2 ​ + O 2 ​ : A g = 0 M o lt e n A l 2 ​ O 3 ​ e l ec t ro l ys i s ​ A l + O 2 ​ : A l = 0 A u + O 2 ​ + K CN → K [ A u ( CN ) 2 ​ ] + K O H : K = + 1 , A u = + 1 Total sum of oxidation states = 1 ( N a ) + 2 ( Z n ) + 0 ( C u ) + 3 ( F e ) + 0 ( A g ) + 0 ( A l ) + 1 ( K ) + 1 ( A u ) = 8.00

Chemistry - Metallurgy Question with Solution | TestHub

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