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Aquomolybdenum(III) chloride as a reducing titrant A potentiometric study
Talanta
|June 1, 1976
Summary
Aquomolybdenum(III) chloride effectively titrates various metal ions and hydrogen peroxide. This reducing agent offers improved titration curve breaks compared to chloromolybdate(III), demonstrating wider applicability in analytical chemistry.
Area of Science:
- Analytical Chemistry
- Inorganic Chemistry
- Electrochemistry
Background:
- Potentiometric titrations are crucial for quantitative analysis.
- Molybdenum compounds are versatile redox agents.
- Developing new titrants enhances analytical precision.
Purpose of the Study:
- To evaluate aquomolybdenum(III) chloride as a reducing agent.
- To investigate its efficacy in titrating specific analytes.
- To compare its performance against existing titrants.
Main Methods:
- Direct potentiometric titration.
- Redox potential measurements.
- Acid concentration variation studies.
Main Results:
- Aquomolybdenum(III) chloride successfully titrated Ce(IV), Cr(VI), Fe(III), V(V), Mo(VI), U(VI), and H2O2.
- Formal redox potentials of Mo(V)/Mo(IV) and Mo(IV)/Mo(III) were determined in varying acid concentrations.
- Superior titration curve breaks were observed compared to chloromolybdate(III).
- Three distinct titration jumps were noted for Mo(VI) reduction, suggesting an intermediate mixed-valence species.
Conclusions:
- Aquomolybdenum(III) chloride is a superior reducing titrant.
- It exhibits broader applicability than chloromolybdate(III).
- The study elucidates molybdenum redox behavior in acidic media.
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