Chemistry Forums for Students > Inorganic Chemistry Forum

Problem while balancing an Equation by Redox Method (Ill possed problem?)

(1/1)

JeanPaulSB:
Hi guys, i have a problem while balancing this equation idk if it is an ill possed problem,  i tried to solve it too many times and i can't get an answer, this equation was assigned by my teacher and need to be solved by redox method.

PH3 + KMnO4 + H2SO4 → K2SO4 + MnSO4 + H3PO4

Trying to solve it, i got this

5PH3+8KMnO4+H2SO4→ K2SO4+8KMnO4+5H3PO4.

I felt so confused with this, pls help me guys :(

chenbeier:
Start with redox pair

PH3 to H3PO4
MnO4- to Mn2+

PH3 + 4 H2O => H3PO4 + 8 H+ + 8 e-

MnO4- + 8 H+ + 5 e- => Mn2+ + 4 H2O

Can you work further

Borek:

--- Quote from: JeanPaulSB on March 15, 2021, 12:50:54 AM ---PH3 + KMnO4 + H2SO4 → K2SO4 + MnSO4 + H3PO4
--- End quote ---

This equation can't be balanced as written, you need one more product.

Navigation

[0] Message Index