In complexometric titrations, initially the indicator forms a metal indicator complex with metal ions which is less stable compared to the metal-EDTA complex. Hexadentate ligand like EDTA acts as a chelating agent that complex with the metal ions in the solution. When all the metal ions form a complex with a chelating agent, the original colour of the indicator in the buffer is observed which reflects the endpoint of the titration
To estimate aluminium by back titration using zinc sulphateMithil Fal Desai
In the complexometric titration of Al3+, excess of EDTA is reacted with Al3+ to form Al-EDTA complex. The unreacted EDTA can be determined by titrating it with a standard solution of Zn2+ using EBT indicator. The pH of the solution is maintained at around 10 using ammonia buffer. The indicator color in the buffer is blue, while the Zn-indicator complex appears wine red. The exact concentration of EDTA salt solution is determined by titrating it with a standard solution of Zn2+ at pH 10, using EBT indicator
Surface area is an important physical property that influences the reactivity, dissolution, catalysis, and separation of materials. The surface area often must be carefully engineered and measured to optimize specific functions. In this Webinar, our applications lab will explain with real-world examples:
- Physical adsorption technique - BET theory
- Sample preparation – the start of a good measurement
- Calculating specific surface area from gas adsorption on solid surfaces
- Troubleshooting – what happens when things go wrong?
View recorded webinars:
http://bit.ly/particlewebinars
To estimate aluminium by back titration using zinc sulphateMithil Fal Desai
In the complexometric titration of Al3+, excess of EDTA is reacted with Al3+ to form Al-EDTA complex. The unreacted EDTA can be determined by titrating it with a standard solution of Zn2+ using EBT indicator. The pH of the solution is maintained at around 10 using ammonia buffer. The indicator color in the buffer is blue, while the Zn-indicator complex appears wine red. The exact concentration of EDTA salt solution is determined by titrating it with a standard solution of Zn2+ at pH 10, using EBT indicator
Surface area is an important physical property that influences the reactivity, dissolution, catalysis, and separation of materials. The surface area often must be carefully engineered and measured to optimize specific functions. In this Webinar, our applications lab will explain with real-world examples:
- Physical adsorption technique - BET theory
- Sample preparation – the start of a good measurement
- Calculating specific surface area from gas adsorption on solid surfaces
- Troubleshooting – what happens when things go wrong?
View recorded webinars:
http://bit.ly/particlewebinars
Gas chromatography-mass spectrometry (GC-MS) is the synergistic combination of two analytical method to separate and identify different substances within a test sample.
Gas chromatography separates the components of a mixture in time.
Mass spectrometer provides information that aids in the identification and structural elucidation of each component.
What is Gravimetric analysis, stepes invloved in gravimetry, Filteration medium in gravimetry, gravimetric factor, application, organic and inorganic prepecating agents
zeolites, types, nature, synthetic, processes, Deposits and properties;Physical characteristics of some naturally occurring zeolites; molecular sieves;Adsorption and related molecular sieving; zeolite catalysts
Determine the composition of the fe3+(jobs method)Mithil Fal Desai
In Job's method, the variation in concentration of the reactants is performed which can reveal the empirical formula of a complex. The method is employed to find the formula of the compound formed by reacting two or more chemical species. The absorption is recorded against different wavelengths and wavelength having maximum absorption is selected. The intensity of solutions with different stoichiometric ratios of the reactants is measured. The highest observed intensity reveals the maximum amount of compound formed. In this experiment, the Fe3+ and salicylic acid are reacted and the wavelength at which the complex absorbs strongly is selected. The absorbance of the different stoichiometric ration of Fe3+ and salicylic acid at a selected wavelength is determined. The maximum absorbance of the solution of the stoichiometric ratio reveals the empirical formula of the complex as the maximum amount of coloured complex is formed.
Here we have discussed about the separation of binary organic mixtures and identification of the functional groups and preparation of solid derivatives.
Introductory PPT on Metal Carbonyls having its' classification,structure and applications.This is a basic level PPT specially prepared for UG/PG Chemistry students.
Determination of the order of reaction between potassium persulphate & potass...PRAVIN SINGARE
This presentation is based on the experimental demonstration of "Determination of the order of reaction between potassium persulphate & potassium iodide by fractional change method". The presentation is for chemistry Undergraduate student of Mumbai University.
Gas chromatography-mass spectrometry (GC-MS) is the synergistic combination of two analytical method to separate and identify different substances within a test sample.
Gas chromatography separates the components of a mixture in time.
Mass spectrometer provides information that aids in the identification and structural elucidation of each component.
What is Gravimetric analysis, stepes invloved in gravimetry, Filteration medium in gravimetry, gravimetric factor, application, organic and inorganic prepecating agents
zeolites, types, nature, synthetic, processes, Deposits and properties;Physical characteristics of some naturally occurring zeolites; molecular sieves;Adsorption and related molecular sieving; zeolite catalysts
Determine the composition of the fe3+(jobs method)Mithil Fal Desai
In Job's method, the variation in concentration of the reactants is performed which can reveal the empirical formula of a complex. The method is employed to find the formula of the compound formed by reacting two or more chemical species. The absorption is recorded against different wavelengths and wavelength having maximum absorption is selected. The intensity of solutions with different stoichiometric ratios of the reactants is measured. The highest observed intensity reveals the maximum amount of compound formed. In this experiment, the Fe3+ and salicylic acid are reacted and the wavelength at which the complex absorbs strongly is selected. The absorbance of the different stoichiometric ration of Fe3+ and salicylic acid at a selected wavelength is determined. The maximum absorbance of the solution of the stoichiometric ratio reveals the empirical formula of the complex as the maximum amount of coloured complex is formed.
Here we have discussed about the separation of binary organic mixtures and identification of the functional groups and preparation of solid derivatives.
Introductory PPT on Metal Carbonyls having its' classification,structure and applications.This is a basic level PPT specially prepared for UG/PG Chemistry students.
Determination of the order of reaction between potassium persulphate & potass...PRAVIN SINGARE
This presentation is based on the experimental demonstration of "Determination of the order of reaction between potassium persulphate & potassium iodide by fractional change method". The presentation is for chemistry Undergraduate student of Mumbai University.
Learning objectives
Introduction
Complexing agents
Complexing Titration using EDTA
Need for Maintenance of pH
pH Indicators used in complexometric Titrations
Types of EDTA Titration
Factors Influencing EDTA reaction
Masking and demasking agents
Conclusion
Reference
The pptx on complexometric titrations, EDTA titration, Why EDTA is used in complexometric titration, Classification of EDTA titration, EDTA titration curve etc.
complexometric titration , colorimetry and spectrophotometry ushaSanmugaraj
it consists of notes for complexometric titration principle, edta, procedure, applications. colorimetry and spectrophotometry principle, introduction, instrumentation and applications
more chemistry contents are available
1. pdf file on Termmate: https://www.termmate.com/rabia.aziz
2. YouTube: https://www.youtube.com/channel/UCKxWnNdskGHnZFS0h1QRTEA
3. Facebook: https://web.facebook.com/Chemist.Rabia.Aziz/
4. Blogger: https://chemistry-academy.blogspot.com/
EDTA Titration
How long could one survive in a perfectly airtight room.docxMithil Fal Desai
How long could one survive in a perfectly airtight room?
Given
Inhaled air contains 21% oxygen while exhaled breath contains approximately 16% oxygen and 5% carbon dioxide
The minimum oxygen level required for survival is 19 %.
Dimensions of room in meters: 5 X 5 X 3
The acidity of water is a measure of the quantitative capacity to react with a mineral base. The measured value usually varies with the pH indicator used in the experiment. The solution of phenolphthalein is colourless in acidic or mild basic medium (pH<8.0), while in basic medium (pH<9.6) solution is pink. The solution of methyl orange is generally red at pH lower than 3.1 and above pH 4.4 the solutions are yellow.
The dissolved strong mineral acids, weak organic acids, dissolved carbon dioxide and hydrolyzed mineral salts may contribute to the measured acidity of natural water. The acidity of water is a significant parameter of water as the presence of acids in natural water contributes to corrosiveness and influences chemical reaction rates. The biological processes are dependent on the acidity of water. The quantitative acidity measurement also reflects the quality of the source of water. The acidity of water is usually expressed in terms of CaCO3.
Determine the strength in grams per litre of a given AgNO3 solution being pro...Mithil Fal Desai
Mohr’s method is used to determine the chloride ion concentration by titrating with silver nitrate. Using pure sodium chloride the strength of silver ions can be also determined as the Ag(I) ions react with chloride ions, quantitatively, to form a precipitate of silver chloride.
This is a small attempt to preserve heritage and folk culture of Goan village Adnem
Credits to Ghanashyam K. Devidas, Lakshimikant Bhavu, Vithobha Bhavu
How to Split Bills in the Odoo 17 POS ModuleCeline George
Bills have a main role in point of sale procedure. It will help to track sales, handling payments and giving receipts to customers. Bill splitting also has an important role in POS. For example, If some friends come together for dinner and if they want to divide the bill then it is possible by POS bill splitting. This slide will show how to split bills in odoo 17 POS.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
Students, digital devices and success - Andreas Schleicher - 27 May 2024..pptxEduSkills OECD
Andreas Schleicher presents at the OECD webinar ‘Digital devices in schools: detrimental distraction or secret to success?’ on 27 May 2024. The presentation was based on findings from PISA 2022 results and the webinar helped launch the PISA in Focus ‘Managing screen time: How to protect and equip students against distraction’ https://www.oecd-ilibrary.org/education/managing-screen-time_7c225af4-en and the OECD Education Policy Perspective ‘Students, digital devices and success’ can be found here - https://oe.cd/il/5yV
Students, digital devices and success - Andreas Schleicher - 27 May 2024..pptx
Estimation of Zinc by EDTA
1. SHREE MALLIKARJUN COLLEGE CLASS:SYBSC
SAFETY: Refer to MSDS of Ethylenediaminetetraacetic acid (EDTA), ammonium hydroxide, ammonium chloride,
Eriochrom Black T (EBT), zinc sulphate
-Dr. Mithil S. FalDesai
Aim: Estimation of Zn by complexometric titrations using EDTA.
Chemicals: Ethylenediaminetetraacetic acid (EDTA), ammonium hydroxide, ammonium
chloride, Eriochrome Black T (EBT), zinc sulphate.
Apparatus: Standard volumetric flask, pipette, burette, conical flask, beakers, funnel and glass
rod.
Theory: In complexometric titrations, initially the indicator forms a metal indicator complex
with metal ions which is less stable compared to the metal-EDTA complex. Hexadentate ligand
like EDTA acts as a chelating agent that complex with the metal ions in the solution. When all
the metal ions form a complex with a chelating agent, the original colour of the indicator in the
buffer is observed which reflects the endpoint of the titration.
Zn2+ + Na2C10H14N2O8 [ZnC10H12N2O8]2- + 2Na+ + 2H+
[molecular formula of EDTA is C10H16N2O8]
Procedure:
i) Standardization of EDTA (~0.01M)
Rinse and fill the burette with EDTA solution. Pipette out 10 mL of 0.01M of ZnSO4 solution
and add 10 mL of the buffer of pH 10. Add 2-3 drops of EBT indicator solution to the flask.
Titrate the solution from the flask against EDTA solution until the red colour of the solution
changes to blue. Repeat the titration to get constant readings.
ii) Estimation of Zn2+ ions.
Rinse and fill the burette with EDTA solution. Pipette out 10 mL of Zn2+ ion solution in a
conical flask and add 10 mL of the buffer of pH 10. Add 2-3 drops of EBT indicator solution to
the flask. Titrate the solution from the flask against EDTA solution until the red colour of the
solution changes to blue. Repeat the titration to get constant readings.
Results: i) Strength of EDTA solution is =____M
ii) Amount of Zn2+ in given water sample = ____g/L.
Further reading (available in the library)
1) Experiments in Applied Chemistry, S. Rattan, S. K Kataria and Sons.
2) Vogel’s textbook of quantitative chemical analysis, J. Mendham, R. C. Denney, J. D. Barns,
M. Thomas, B. Sivasankar, Pearson India Education, 6th Edition.
Questions: 1) What is the theoretical endpoint of a complexometric titration?
2) How complexation stabilize the metal ions?
3) What is the importance of pH in complexometric titration?
4) List any two applications of EDTA titration.
5) How a mixture of Ca and Mg can be determined volumetrically?
![SHREE MALLIKARJUN COLLEGE CLASS:SYBSC
SAFETY: Refer to MSDS of Ethylenediaminetetraacetic acid (EDTA), ammonium hydroxide, ammonium chloride,
Eriochrom Black T (EBT), zinc sulphate
-Dr. Mithil S. FalDesai
Aim: Estimation of Zn by complexometric titrations using EDTA.
Chemicals: Ethylenediaminetetraacetic acid (EDTA), ammonium hydroxide, ammonium
chloride, Eriochrome Black T (EBT), zinc sulphate.
Apparatus: Standard volumetric flask, pipette, burette, conical flask, beakers, funnel and glass
rod.
Theory: In complexometric titrations, initially the indicator forms a metal indicator complex
with metal ions which is less stable compared to the metal-EDTA complex. Hexadentate ligand
like EDTA acts as a chelating agent that complex with the metal ions in the solution. When all
the metal ions form a complex with a chelating agent, the original colour of the indicator in the
buffer is observed which reflects the endpoint of the titration.
Zn2+ + Na2C10H14N2O8 [ZnC10H12N2O8]2- + 2Na+ + 2H+
[molecular formula of EDTA is C10H16N2O8]
Procedure:
i) Standardization of EDTA (~0.01M)
Rinse and fill the burette with EDTA solution. Pipette out 10 mL of 0.01M of ZnSO4 solution
and add 10 mL of the buffer of pH 10. Add 2-3 drops of EBT indicator solution to the flask.
Titrate the solution from the flask against EDTA solution until the red colour of the solution
changes to blue. Repeat the titration to get constant readings.
ii) Estimation of Zn2+ ions.
Rinse and fill the burette with EDTA solution. Pipette out 10 mL of Zn2+ ion solution in a
conical flask and add 10 mL of the buffer of pH 10. Add 2-3 drops of EBT indicator solution to
the flask. Titrate the solution from the flask against EDTA solution until the red colour of the
solution changes to blue. Repeat the titration to get constant readings.
Results: i) Strength of EDTA solution is =____M
ii) Amount of Zn2+ in given water sample = ____g/L.
Further reading (available in the library)
1) Experiments in Applied Chemistry, S. Rattan, S. K Kataria and Sons.
2) Vogel’s textbook of quantitative chemical analysis, J. Mendham, R. C. Denney, J. D. Barns,
M. Thomas, B. Sivasankar, Pearson India Education, 6th Edition.
Questions: 1) What is the theoretical endpoint of a complexometric titration?
2) How complexation stabilize the metal ions?
3) What is the importance of pH in complexometric titration?
4) List any two applications of EDTA titration.
5) How a mixture of Ca and Mg can be determined volumetrically?](https://image.slidesharecdn.com/estimationofzn-210617045602/85/Estimation-of-Zinc-by-EDTA-1-320.jpg)
