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Chemistry: Balancing Redox reactions

Jan 27, 2016
72
What do i have wrong here for my chemical equation? Seems to be right but my homework wont accept it.

Balance the redox reaction occurring in acidic solution.

Sn(s)+MnO−4(aq) → Sn2+(aq)+Mn2+(aq)

Express your answer as a chemical equation including phases.



5Sn+2MnO−4+16H+→5Sn2++2Mn2++8H2O


is this correct?
 

Klaas van Aarsen

MHB Seeker
Staff member
Mar 5, 2012
9,491
What do i have wrong here for my chemical equation? Seems to be right but my homework wont accept it.

Balance the redox reaction occurring in acidic solution.

Sn(s)+MnO−4(aq) → Sn2+(aq)+Mn2+(aq)

Express your answer as a chemical equation including phases.



5Sn+2MnO−4+16H+→5Sn2++2Mn2++8H2O


is this correct?
Hi needOfHelpCMath !

It seems correct to me, although the question does ask to include phases.
So should it perhaps be:
$$Sn(s)+MnO^−_4(aq) → Sn^{2+}(aq)+Mn^{2+}(aq)$$
$$5Sn(s)+2MnO^−_4(aq) + 16H^+(aq)→ 5Sn^{2+}(aq)+2Mn^{2+}(aq) + 8H_2O
$$
(Wondering)
 
Jan 27, 2016
72
Hi needOfHelpCMath !

It seems correct to me, although the question does ask to include phases.
So should it perhaps be:
$$Sn(s)+MnO^−_4(aq) → Sn^{2+}(aq)+Mn^{2+}(aq)$$
$$5Sn(s)+2MnO^−_4(aq) + 16H^+(aq)→ 5Sn^{2+}(aq)+2Mn^{2+}(aq) + 8H_2O
$$
(Wondering)
So inputed your answer and it said "Check your placement of subscripts and super subscripts"
 

Klaas van Aarsen

MHB Seeker
Staff member
Mar 5, 2012
9,491
So inputed your answer and it said "Check your placement of subscripts and super subscripts"
Perhaps MnO-4 should be the other way around. That is, it should be MnO4-, since it's really $(MnO_4)^-$. (Thinking)