Complete and balance the equation for this reaction in acidic solution. Question

Question

Complete and balance the equation for this reaction in acidic solution.

Question 10 of 32 Incorrect Incorrect Incorrect Map General Chemistry 4th Editiop University Science Books presented by Sapling Learning cQuarrie Rock Gallo Complete and balance the equation for this reaction in acidic solution Tip: If you need to clear your work and reset the equation, click the button that looks like two red arrows. ich species was the... oxidizing agent?reducing agent? Which element got... oxidized'? reduced? O ZnS NO3 O NO3 Zn 2+ 2+

Explanation / Answer

The given equation is

ZnS + NO-3 ----> Zn2+ + S + NO

The oxidation and reduction reactions for above equation is

Oxidation reaction: 3(ZnS ---> Zn2+ + S(s) +2e-)

Reduction reaction: 2(4H+ + NO-3 + 3e- ----> NO + 2H2O)

The combined reaction is 3ZnS + 8H+ + 2NO-3 -----> 3Zn2+ + 3S(s) + 2NO(g) + 4H2O(l)

Now the balanced molecular reaction is 3ZnS + 8HNO3(aq) ----> 3Zn(NO3)2(aq) + 3S(s) + 2NO(g) + 4H2O(l)

Oxidizing agent: The substance which oxidizes other substances that means which causes others to loose electrons.

Reducing agent: The substance which reduces other substances that means which causes others to gain electrons.

In this reaction,

Oxidized element is Sulphur. As it is reduced from ZnS to S (sulphur gas)

Reduced element is Nitrogen. As it is oxidized from NO-3 to NO.

Oxidizing agent is NO-3. The agent which participates in reduction process is oxidizing agent (NO-3)

Reducing agent is ZnS. The agent which participates in oxidation process is reducing agent (ZnS)

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