The use of natural materials began to be developed on a large scale in chemistry. Natural substances are safe use, easy find, and cheaper. Biological indicators volumetric titration the focus experts. This study presented visualization alkalimetric weak acid with strong base addition indicators. Hibiscus rosa-sinensis L. Clitoria ternatea flowers were used as for diprotic acid, namely oxalic ba...

The main objective of this study was to develop an effective potentiometric saturation titration protocol for determining the aqueous intrinsic solubility and the solubility-pH profile of ionizable molecules, with the specific aim of overcoming incomplete dissolution conditions, while attempting to shorten the data collection time. A modern theory of dissolution kinetics (an extension of the No...

-Acidified suspensions of Al-saturated kaolinite, montmorillonite, mica, illite, and biotite in 10 -a M NaNO3 were potentiometrically titrated with 0.1 N NaOH and 0.1 N HNO3 in succession in a COz-free nitrogen atmosphere. The resulting curves were compared with those for AI(NO3)3 solutions of similar AI concentration in the supernatant solution and corrected for Al in the entrained solution in...

Acid or base concentrations can be determined by performing an acid-base titration with coulometrically generated OHor H+ ions at a noble metal actuator electrode in close proximity to the pH-sensitive gate of an ISFET. It is shown, both theoretically and experimentally, that the relation between the acid or base concentration and the time needed to reach the equivalence point in the resulting ...