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Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
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tony9506 tony9506
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11 years ago
What are the coefficients of the six species in the balanced equation above? Remember to include coefficients for H20 (l) and H+(aq) in the appropriate blanks.
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#1
11 years ago
BrO3(-)+6e+6H(+)=Br(-)+3H2O
Sn(2+)-2e=Sn(4+) !!x3
======================
BrO3(-)+6H(+)+3Sn(2+)=
Br(-)+3H2O+3Sn(4+)


MnO2 forms if pH=7
if pH>7 then forms MnO4(2-)
if pH=7 then:
MnO4(-)+3e+2H2O=MnO2+4OH(-) !!x2
SO3(2-)-2e+2OH(-)=SO4(2-)+H2O !!x3
============================
2MnO4(-)+4H2O+3SO3(2-)+6OH(-)=
2MnO2+8OH(-)+3SO4(2-)+3H2O
So we have:
2MnO4(-)+H2O+3SO3(2-)=
2MnO2+3SO4(2-)+2OH(-)

if pH>7 then:
MnO4(-)+e=MnO4(2-) !!x2
SO3(2-)-2e+2OH(-)=SO4(2-)+H2O
=======================
2MnO4(-)+SO3(2-)+2OH(-)=
2MnO4(2-)+SO4(2-)+H2O
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