Thermometric Titration of Acids in Presence of Hydrolyzable Cations
A thermometric titration method is presented for determining acid in aqueous solutions of zirconyl ion in hydrofluoric acid, uranyl ion in sulfuric acid, uranyl and copper(II) ions in sulfuric acid. thorium(IV) ion in nitric acid, and uranyi ion in nitric acid. This free acid'' is determined by iitrating the test solution with a standard solution of a base and recording the change in temperature during the titration. Temperature, as detected by a thermistor, is plotted automatically by a recording potentiometer vs. volume of titrant added. The end point of the titration is obtained by extrapolating the straightline portions of the curve to their point of intersection. Milliequivalent quantities of free acid can be determined. For 0.1 meq., the relative standard error is plus or minus 1 to plus or minus 2% at the 95% confidence level; for 0.01 meq., it increases to about a 5%.
- Research Organization:
- Oak Ridge National Lab., Tenn.
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-13-019863
- OSTI ID:
- 4220161
- Journal Information:
- Analytical Chemistry, Journal Name: Analytical Chemistry Journal Issue: 9 Vol. 31; ISSN 0003-2700
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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Related Subjects
ACIDS
CATIONS
COPPER COMPOUNDS
DIAGRAMS
ELECTRIC POTENTIAL
ERRORS
HYDROFLUORIC ACID
HYDROLYSIS
NITRIC ACID
QUANTITATIVE ANALYSIS
REACTIVITY
RECORDING SYSTEMS
SOLUTIONS
SULFURIC ACID
TEMPERATURE
THORIUM COMPOUNDS
URANYL COMPOUNDS
WATER
ZIRCONIUM COMPOUNDS