HOME

Course Chapters

Calculator Fundamentals

Mathematics Review

Basic Concepts

Advanced Concepts


Section Tests

Pre-test

Post-test


Useful Materials

Glossary


Online Calculators

Redox Calculator

Kinetics Arrhenius Calculator

Thermodynamics Calculator

Nuclear Decay Calculator

Linear Least Squares Regression

Newton's Method Equation Solver

Compressibility Calculator

Units Conversion Calculator

Nomenclature Calculator


Related Information Links

Texas Instruments Calculators

Casio Calculators

Sharp Calculators

Hewlett Packard Calculators


Credits

Contact Webmaster


Solution:

The equation is:
S + NO3- ---> SO2 + NO

Oxidation half-reaction:

S ---> SO2
S + 2H2O ---> SO2 +4H+ + 4e-

Reduction half-reaction:

NO3- ---> NO
NO3_ + 4H+ + 3e- ---> NO+2H2O

To have the same number of electrons in both half-reactions, multiply the oxidation reaction by 3 and multiply the reduction reaction by 4. After this, add the two half-reactions together and then cancel:

4NO3- +3S +16H+ +6H2O ---> 3SO2 + 16H+ + 4NO +8H2O

4NO3- + 3S +4H+ ---> 3SO2 + 4NO + 2H2

Back to the Redox Page


Developed by
The Shodor Education Foundation, Inc.
in cooperation with the Department of Chemistry,
The University of North Carolina at Chapel Hill

Copyright © 1998
Last Update:
Please direct questions and comments about this page to
WebMaster@shodor.org