Understanding Complexometric Titration

Hello friends, today I am going to discuss about complexometric titration. First I will discuss about the principle of complexometric titration. I am taking one example of complexometric titration to explain the principle of complexometric titration. For example, in your sample if calcium and magnesium ions are present, that is present in your sample. that is present in your sample in this sample you have to add indicator indicator is commonly used indicator is EBT that is your chrome Black T indicator Another name of Eriochrome black T indicator is Modern black T Modern black 2 indicator Another name of this same indicator is Solochrome black T Solucrum black tea ok so in your sample calcium and magnesium ions are already present then you will add indicator Irioprum black tea indicator this will form complex with Calcium and magnesium ions present in your sample and the final color of this solution will be wine red. It will be wine red in color. After addition of indicator. We have to titrate this particular solution with EDTA. EDTA is a complexing agent. EDTA is a complexing agent. It will act as a titrant. It is standard. So we will add EDTA from the murate and then after completion of titration or at the end point what happens? All calcium and magnesium ions will react with EDTA. EDTA will react with EDTA this is the complex complex are complexing agent and metal ions this is also known as chelate chelate ok so at the end point formation of chelate means all calcium and magnesium ions will react with EDTA and this will known as chelate apart from this apart from this we will get eBT this indicator this indicator will be free initially it was formed it was reacted with initially eBT will react with calcium and magnesium and when we will add EDTA calcium and magnesium will form chelate with EDTA then eBT from black tea indicator will be free from in this condition color of this complex color of this chelate will be colorless and color of EBT if you want black T indicator will be blue okay so this color this he let and the EBT both will present in the same solution so this more this so both are present in the same solution so colorless complex and the area from black if we indicator is blue in color and the final color will be final color of the solution will be blue because if you will mix colorless and a blue solution then final color will be blue okay so this will be the input what happens this calcium and magnesium ion will initially react with the iriocrome black tea indicator and you will titrate with EDTA after titration it will form chelate in the same solution eb-tiriocrome black tea indicator will be in free form after completion of the reaction this is happen at the end point so final color will be blue means from starting you will start with the winded color and then color of the solution will be blue at the end point this is the end point so this is the basic principle about the complexometric titration So, complexometric titration is a type of polymetric analysis in which we are taking the fixed volume of sample or analyte and we will titrate with EDT. that is complexing is m that and a standard concentration of EDTA will be known to us so by using EDTA we can calculate the we can calculate the concentration of the metal ions okay so this is the basic funda about the complexometric titration complexometric titration is mainly used for detection of metal ions next topic I am going to discuss about the complexometric about the complexometric regression is complexing agents complexing agents used in complexometric titration. So these are the mainly used complexing agents in complexometric titration. First one is EDTA that is ethylene diamine tetrastic acid. This is most commonly used. Sodium spot of EDTA is most commonly used in laboratory. Then next one is second one is DTPA that is diethylene triamine tetra penta acetic acid that is also used. Then third one is EGTA that is ethylene like all this. I might know ethyl ethyl tetra acetic acid and ammonia is used as a complex complex agent and sometimes sometimes ethylenediamine is also used as a complex complex agent so now I am going to discuss about the structure of all this complex agent so the structure of EDK is that is CS2 CS2 N CS2 COOH C is to COOH in CS to CO OH 3 is to see oh boy so this is the structure of EDT now I am going to discuss about the structure of BTB that is it high die it had dipethylene triamine pentastric acid so we will start with n so here CH 2 CH 2 n CH 2 C s2 and so here that is try me try me three nitrogen is there then fantastic acid so we have made five astig acid is still blue cs2 coo h cs2 coo h cs2 coo h cs2 coo h cs2 coo h cs2 coo h So this is the structure of DTPI, diethylene, trinoin, pentastic acid. Now structure of EGT that is ethylene glycol, bis, amino, ethyl ether, tetraacetic acid. We will start with CH2, CH2O. Here also O, CH2, CH2, CH2, CH2, then N. CS2COOH CS2COOH and CS2COOH CS2COOH This is the structure of EGTA then structure of ammonia that is simple NS3 sometimes ammonia is also a present complex and then the complex is the example ammonia plus cu2 plus it will form complex like cu ns3 2 plus okay sometimes ethylene diamine is also used as a complex agent so structure of ethylene diamine is ns2 ch2 ch2 NH2 okay so these are the mainly complexing agent used in complexometric titration first one is EDTA EDTA is hexadentities in nature because it can form complex from from six part this one is the first second third fourth then it can form complex from here and here also form complex from nitrogen atom nitrogen will be plus charged okay so DTP a DT P is kept rented because so the after rented because one two three four five six seven eight from eight positions in it can form complex with metal ions this one easy to easy case 3,4,5,6 it is hexadentate then here ammonia is monodentate and diethylenediamine is bidentate it can form complex from two places so this is the overview about the complexing agents used in complexometric titration these are the mainly complexing agents commonly used complexing agent titration in the laboratory is EDTX sodium salt of EDTX used that is known as disodium EDTA so disodium EDTA is used in complex electric rotation because

For example, in your sample if calcium and magnesium ions are present, that is present in your sample. that is present in your sample in this sample you have to add indicator indicator is commonly used indicator is EBT that is your chrome Black T indicator Another name of Eriochrome black T indicator is Modern black T Modern black 2 indicator Another name of this same indicator is Solochrome black T Solucrum black tea ok so in your sample calcium and magnesium ions are already present then you will add indicator Irioprum black tea indicator this will form complex with Calcium and magnesium ions present in your sample and the final color of this solution will be wine red. It will be wine red in color.

After addition of indicator. We have to titrate this particular solution with EDTA. EDTA is a complexing agent.

EDTA is a complexing agent. It will act as a titrant. It is standard.

So we will add EDTA from the murate and then after completion of titration or at the end point what happens? All calcium and magnesium ions will react with EDTA. EDTA will react with EDTA this is the complex complex are complexing agent and metal ions this is also known as chelate chelate ok so at the end point formation of chelate means all calcium and magnesium ions will react with EDTA and this will known as chelate apart from this apart from this we will get eBT this indicator this indicator will be free initially it was formed it was reacted with initially eBT will react with calcium and magnesium and when we will add EDTA calcium and magnesium will form chelate with EDTA then eBT from black tea indicator will be free from in this condition color of this complex color of this chelate will be colorless and color of EBT if you want black T indicator will be blue okay so this color this he let and the EBT both will present in the same solution so this more this so both are present in the same solution so colorless complex and the area from black if we indicator is blue in color and the final color will be final color of the solution will be blue because if you will mix colorless and a blue solution then final color will be blue okay so this will be the input what happens this calcium and magnesium ion will initially react with the iriocrome black tea indicator and you will titrate with EDTA after titration it will form chelate in the same solution eb-tiriocrome black tea indicator will be in free form after completion of the reaction this is happen at the end point so final color will be blue means from starting you will start with the winded color and then color of the solution will be blue at the end point this is the end point so this is the basic principle about the complexometric titration So, complexometric titration is a type of polymetric analysis in which we are taking the fixed volume of sample or analyte and we will titrate with EDT. that is complexing is m that and a standard concentration of EDTA will be known to us so by using EDTA we can calculate the we can calculate the concentration of the metal ions okay so this is the basic funda about the complexometric titration complexometric titration is mainly used for detection of metal ions next topic I am going to discuss about the complexometric about the complexometric regression is complexing agents complexing agents used in complexometric titration.

So these are the mainly used complexing agents in complexometric titration. First one is EDTA that is ethylene diamine tetrastic acid. This is most commonly used. Sodium spot of EDTA is most commonly used in laboratory.

Then next one is second one is DTPA that is diethylene triamine tetra penta acetic acid that is also used. Then third one is EGTA that is ethylene like all this. I might know ethyl ethyl tetra acetic acid and ammonia is used as a complex complex agent and sometimes sometimes ethylenediamine is also used as a complex complex agent so now I am going to discuss about the structure of all this complex agent so the structure of EDK is that is CS2 CS2 N CS2 COOH C is to COOH in CS to CO OH 3 is to see oh boy so this is the structure of EDT now I am going to discuss about the structure of BTB that is it high die it had dipethylene triamine pentastric acid so we will start with n so here CH 2 CH 2 n CH 2 C s2 and so here that is try me try me three nitrogen is there then fantastic acid so we have made five astig acid is still blue cs2 coo h cs2 coo h cs2 coo h cs2 coo h cs2 coo h cs2 coo h So this is the structure of DTPI, diethylene, trinoin, pentastic acid. Now structure of EGT that is ethylene glycol, bis, amino, ethyl ether, tetraacetic acid. We will start with CH2, CH2O.

Here also O, CH2, CH2, CH2, CH2, then N. CS2COOH CS2COOH and CS2COOH CS2COOH This is the structure of EGTA then structure of ammonia that is simple NS3 sometimes ammonia is also a present complex and then the complex is the example ammonia plus cu2 plus it will form complex like cu ns3 2 plus okay sometimes ethylene diamine is also used as a complex agent so structure of ethylene diamine is ns2 ch2 ch2 NH2 okay so these are the mainly complexing agent used in complexometric titration first one is EDTA EDTA is hexadentities in nature because it can form complex from from six part this one is the first second third fourth then it can form complex from here and here also form complex from nitrogen atom nitrogen will be plus charged okay so DTP a DT P is kept rented because so the after rented because one two three four five six seven eight from eight positions in it can form complex with metal ions this one easy to easy case 3,4,5,6 it is hexadentate then here ammonia is monodentate and diethylenediamine is bidentate it can form complex from two places so this is the overview about the complexing agents used in complexometric titration these are the mainly complexing agents commonly used complexing agent titration in the laboratory is EDTX sodium salt of EDTX used that is known as disodium EDTA so disodium EDTA is used in complex electric rotation because

Transcript for:Understanding Complexometric Titration

Transcript for:
Understanding Complexometric Titration