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Conductance can increase after the end point in conductometric titrations due to the presence of excess titrant in the solution, leading to higher conductivity. This excess titrant can contribute to the conductance of the solution and cause an increase in measured conductance. Factors such as incomplete reaction or side reactions can also contribute to the increase in conductance post-end point.
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Types of conductometric titration?
Some types of conductometric titrations include acid-base titrations, redox titrations, and precipitation titrations. Conductometric titration involves measuring the change in electrical conductivity as reactants are titrated against each other until an equivalence point is reached.
What are the differences between conductometric and volumetric titrations?
Conductometric titrations measure the change in electrical conductivity during a titration, while volumetric titrations measure the volume of titrant needed to reach the equivalence point. Conductometric titrations are more sensitive to small changes in concentration, while volumetric titrations are more straightforward to perform and interpret.
Why oxalic acid is used in conductometric titrations?
Oxalic acid is used in conductometric titrations because it is a strong electrolyte that dissociates completely in solution, leading to a sharp increase in conductivity at the equivalence point. This makes it easier to accurately determine the endpoint of the titration.
What is the difference between conductometric and volumetric titrations?
Coductometric titration: is based on the suddenly change of the conductivity at the equivalence point.Volumetric titration: the volume of a standardized titrant is measured at the eqivalence point.
What is conductometric titrations?
Acid-base titrations redox titrations are known to us in which commonly indicators are used to locate the end point eg., methyl orange,phenolphlthalene for acid base titrations and starch solutions for iodemetry type redox process. How ever electrical conductance measurement canbe used as a tool to locate the end point. eg1. HCl vs NaOH Consider a solution of a strong acid, hydrochloric acid, HCl for instance, towhich a solution of a strong base, sodium hydroxide NaOH, is added. The reaction occurs. For each amount of NaOH added equivalent amount of hydrogen ions is removed. Effectively, the faster moving H+ cation is replaced by the slower moving Na+ ion, and the conductivity of the titrated solution as well as the measured conductance of the cell fall. This continues until the equivalence point is reached, at which we have a solution of sodium chloride, NaCl. If more base is added an increase in conductivity or conductance is observed, since more ions are being added and the neutralization reaction no longer removes an appreciable number any of them. Consequently, in the titration of a strong acid with a strong base, the conductance has a minimum at the equivalence point. This minimum can be used instead of an indicator dye to determine the endpoint of the titration. Conductometric titration curve, that is a plot of the measured conductance or conductivity values against the number of milliliters of NaOH solution, is shown in Fig. sorry I could not send the graph, and refer other cases but for a detailed discussion, you may mail --Dr.T.SRINIVASA MURTHY MSC., Ph.D ,Sr Faculty (IIT-JEE) ,NARAYANA ACADEMY HYDERABAD MAIL : vasuchemistry@gmail.com
Types of conductometric titration?
Some types of conductometric titrations include acid-base titrations, redox titrations, and precipitation titrations. Conductometric titration involves measuring the change in electrical conductivity as reactants are titrated against each other until an equivalence point is reached.
What are the differences between conductometric and volumetric titrations?
Conductometric titrations measure the change in electrical conductivity during a titration, while volumetric titrations measure the volume of titrant needed to reach the equivalence point. Conductometric titrations are more sensitive to small changes in concentration, while volumetric titrations are more straightforward to perform and interpret.
Why oxalic acid is used in conductometric titrations?
Oxalic acid is used in conductometric titrations because it is a strong electrolyte that dissociates completely in solution, leading to a sharp increase in conductivity at the equivalence point. This makes it easier to accurately determine the endpoint of the titration.
What is the difference between conductometric and volumetric titrations?
Coductometric titration: is based on the suddenly change of the conductivity at the equivalence point.Volumetric titration: the volume of a standardized titrant is measured at the eqivalence point.
What is conductometric titrations?
Acid-base titrations redox titrations are known to us in which commonly indicators are used to locate the end point eg., methyl orange,phenolphlthalene for acid base titrations and starch solutions for iodemetry type redox process. How ever electrical conductance measurement canbe used as a tool to locate the end point. eg1. HCl vs NaOH Consider a solution of a strong acid, hydrochloric acid, HCl for instance, towhich a solution of a strong base, sodium hydroxide NaOH, is added. The reaction occurs. For each amount of NaOH added equivalent amount of hydrogen ions is removed. Effectively, the faster moving H+ cation is replaced by the slower moving Na+ ion, and the conductivity of the titrated solution as well as the measured conductance of the cell fall. This continues until the equivalence point is reached, at which we have a solution of sodium chloride, NaCl. If more base is added an increase in conductivity or conductance is observed, since more ions are being added and the neutralization reaction no longer removes an appreciable number any of them. Consequently, in the titration of a strong acid with a strong base, the conductance has a minimum at the equivalence point. This minimum can be used instead of an indicator dye to determine the endpoint of the titration. Conductometric titration curve, that is a plot of the measured conductance or conductivity values against the number of milliliters of NaOH solution, is shown in Fig. sorry I could not send the graph, and refer other cases but for a detailed discussion, you may mail --Dr.T.SRINIVASA MURTHY MSC., Ph.D ,Sr Faculty (IIT-JEE) ,NARAYANA ACADEMY HYDERABAD MAIL : vasuchemistry@gmail.com
Graph for the conductometric titration between a weak acid and a srong base?
Weak Acid with a Strong Base, e.g. acetic acid with NaOH: Initially the conductance is low due to the feeble ionization of acetic acid. On the addition of base, there is decrease in conductance not only due to the replacement of H+ by Na+ but also suppresses the dissociation of acetic acid due to common ion acetate. But very soon, the conductance increases on adding NaOH as NaOH neutralizes the un-dissociated CH3COOH to CH3COONa which is the strong electrolyte. This increase in conductance continues raise up to the equivalence point. The graph near the equivalence point is curved due the hydrolysis of salt CH3COONa. Beyond the equivalence point, conductance increases more rapidly with the addition of NaOH due to the highly conducting OH− ions
What is the principle of conductometric titration?
The principle of conductometric titration involves measuring the change in electrical conductivity of a solution as a titrant is added to a sample solution. This change in conductivity occurs due to the formation or consumption of ions during the titration process, which can be used to determine the endpoint of the titration. Conductometric titration is commonly used to determine the concentration of ions in a solution or to identify the equivalence point in acid-base titrations.
Advantages of conductometric titration?
1. this method can be used with very diluted solutions=2. this method can be used with colored or turbid solutions in which end point can not== be seen by eye==3. this method can be used in which there is no suitable indicator==4.has many applications , i.e. it can be used for acid base , redox ,precipitation, or complex titrations=
Application of conductometric titration.?
Conductometric titration is used in analytical chemistry to determine the endpoint of a titration by monitoring changes in electrical conductivity. It is commonly used to determine the concentration of ions in a solution, such as the determination of the calcium ion concentration in water or the acid content in a sample. Conductometric titration is also useful in studying complexation reactions and acid-base titrations.
Conductometric titration of a strong acid with a strong base?
In conductometric titration of a strong acid with a strong base, as the base is added to the acid solution, the conductivity of the solution increases due to the formation of ions. The inflection point of the titration curve corresponds to the stoichiometric equivalence point, where all the acid has been neutralized by the base. The conductivity then remains constant beyond this point, indicating excess of the base.
Why do we perform the titrations slowly?
Performing titrations slowly allows for more precise endpoint detection and minimizes the chances of overshooting the equivalence point. This helps ensure accurate measurement of the volume of titrant needed to reach equivalence and increases the reliability of the results.
What is conductometric tiration?
Conductometric titration is a method of titration where the end point is determined by measuring the change in electrical conductivity of the solution being titrated. It is commonly used to determine the concentration of ions in a solution.
