ACIDIMETRY AND ALKALIMETRY PDF

Alkalimetry is the specialized analytic use of acid-base titration to determine the concentration of a basic synonymous to alkaline substance. Acidimetry, sometimes spelled acidometry, is the same concept of specialized analytic acid-base titration, but for an acidic substance. The conical flask contained solution that just reached the endpoint. A suitable pH indicator must be chosen in order to detect the end point of the titration.

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Alkalimetry is the specialized analytic use of acid-base titration to determine the concentration of a basic synonymous to alkaline substance. Acidimetry, sometimes spelled acidometry, is the same concept of specialized analytic acid-base titration, but for an acidic substance. The conical flask contained solution that just reached the endpoint. A suitable pH indicator must be chosen in order to detect the end point of the titration. The color change or other effect should occur close to the equivalence point of the reaction so that the experimenter can accurately determine when that point is reached.

When a weak acid reacts with a weak base, the equivalence point solution will be basic if the base is stronger and acidic if the acid is stronger. If both are of equal strength, then the equivalence pH will be neutral. However, weak acids are not often titrated against weak bases because the colour change shown with the indicator is often quick, and therefore very difficult for the observer to see the change of colour.

The point at which the indicator changes colour is called the end point. A suitable indicator should be chosen, preferably one that will experience a change in colour an end point close to the equivalence point of the reaction. Mathematical analysis: titration of weak acid[ edit ] The pH of a weak acid solution being titrated with a strong base solution can be found at different points along the way.

These points fall into one of four categories: [2] initial pH pH before the equivalence point pH at the equivalence point pH after the equivalence point for more rigorous calculation, using a RICE chart is required. In fact the equations below are a simplification of the RICE chart.

Animation of titration with base titrant The initial pH is approximated for a weak acid solution in water using the equation pH.

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Acid–base titration

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