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Why are platinized platinum electrodes used in conductometric measurements?
Platinized platinum electrodes are used in conductometric measurements because their surface is modified with platinum black, which increases the effective surface area and enhances the electrode's sensitivity and conductivity. This modification improves the electrode's response to ionic changes in a solution, allowing for more accurate and reliable measurements of conductivity. Additionally, platinized electrodes exhibit excellent stability and resistance to fouling, making them suitable for long-term use in various chemical environments.
Why hydrogen electrode is not used in pH titration?
The hydrogen electrode is not commonly used in pH titrations because it is relatively unstable and requires careful handling to maintain its performance. Additionally, it can be affected by the presence of other ions in the solution, which may lead to inaccurate measurements. More stable and reliable electrodes, like glass electrodes, provide more consistent and direct readings of pH, making them preferable for titration purposes.
Type of electrodes used to electrically stimulate the brain?
Common types of electrodes used for electrical brain stimulation include intracranial electrodes (such as depth electrodes or grids), subdural electrodes, and transcranial electrodes. These electrodes are used in techniques like deep brain stimulation (DBS), electrocorticography (ECoG), and transcranial direct current stimulation (tDCS) to modify neural activity for therapeutic or research purposes.
What types of electrodes are used?
1. M.M.O.(MIXED METAL OXIDE) 2. MAGNESIUM ANODE3. ALUMINIUM ANODE4. ZINC ANODE5. PURE IRON ANODE6. PENCIL ANODE7. H.S.C.I. ANODE(high silicon cast iron)8. Pb-Ag ANODE9. PLATINUM ANODE (Pt-Ti & Pt-Nb)
What inert metal is often used in electrodes and has an atomic number of 78?
The inert metal often used in electrodes with an atomic number of 78 is gold (Au).
Why you use only platinum electrodes in conductometric titrations?
Platinum electrodes are commonly used in conductometric titrations because they are inert, meaning they do not react with the solutions being tested, ensuring accurate measurements. In addition, platinum electrodes have good electrical conductivity and stability, making them reliable for consistent and precise titration results.
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.
What are the type of conductometric titration?
The types of conductometric titrations include strong acid-strong base titrations, weak acid-strong base titrations, weak base-strong acid titrations, and precipitation titrations. Conductometric titrations measure the change in electrical conductivity of a solution as a titrant is added, allowing for the determination of the endpoint of the reaction.
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.
How do you minimize errors in conductometric titrations?
To minimize errors in conductometric titrations, ensure accurate calibration of the conductivity meter, use high-quality chemicals and glassware, maintain a constant temperature, and perform multiple titrations to obtain consistent results. Additionally, ensure the stirring is uniform during the titration process to minimize errors.
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.
Why is it necessary to dilute the titrand in conductometric titrations?
Diluting the titrand in conductometric titrations helps to ensure a more linear relationship between the conductivity and the concentration of the analyte. This can improve the accuracy and precision of the titration results. Additionally, dilution can prevent issues such as excessive conductivity that could lead to errors in the titration endpoint determination.
Why are platinized platinum electrodes used in conductometric measurements?
Platinized platinum electrodes are used in conductometric measurements because their surface is modified with platinum black, which increases the effective surface area and enhances the electrode's sensitivity and conductivity. This modification improves the electrode's response to ionic changes in a solution, allowing for more accurate and reliable measurements of conductivity. Additionally, platinized electrodes exhibit excellent stability and resistance to fouling, making them suitable for long-term use in various chemical environments.
Why do conductance increases after the end point in conductometric titrations?
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.
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=
