What is the point of equivalence?

The

point of equivalence is the point in chemical titration - which means the process of determining the dissolved substance by means of an induced reaction - the amount of titrated substance is large enough to fully react with the pattern. Sometimes it is also referred to as a stemiometric point. The equivalence point can be determined in a number of different ways using characters such as pH indicators, color change, conductivity or precipitation. The concentration of the reaction agent can be derived by titration of the known substance into the reactant sample and finding the point of the equivalence of the reaction. Below is a specific volume of analyte or solution into which the titrant drips. The concentration of the titrant is known, while the analyte pointer is unknown. Gradually, Byret is emptied into an analytical solution until the analysis changes, which signals the point of the equivalence. At the point of equivalence, the amount of the added titrant completely responded with the reactant in the analyte, and now the concentration of analytical solution can be determined.

In the titrations based on acid, where the acid is titrated to the base or vice versa, the analytical solution is often added a compound of ph indicator, so the equivalence point can be determined visually. Phenolftalein is a commonly used pH indicator that is colorless at low pH levels, but at a high pH becomes clear pink. The equivalent point in the sour base titration involving phenolftalein would be signaled by a rapid change in color to pink. Different pH indicators are used to indicate changes in different pH rates as needed.

Sometimes the color of the analyte changes during the titration without the use of the indicator. The equivalent points of oxidative reduction (redox) can be determined in this way, as the oxidation states of the product and the reactant produce different colors. It is also possible that the titration reaction causes a clot or solid. Cares can therefore be used as an indicator of the point of equivalence, although the exact precipitation point is difficult to determine.

Another BetoDy that can be used to determine the equivalence point include measuring the conductivity of the solution, direct measurement of the ph meter pH and the speed measurement rate. This latest process is known as the thermal titrimetry. Thermetric titrimetry uses the fact that the chemical reaction between the titrant and the analyte will be either exothermic - relaxing heat - or endothermic - absorbing heat. Depending on the reaction, the temperature either increases or drops. The maximum temperature change in response is the point of equivalence.