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Is EDTA considered as a primary standard?
No. Chemical compounds have to fulfill a number of requirements before they can be classified and used as a primary standard: A primary standard in chemistry is a reliable, readily quantified substance. Features of a primary standard include: 1. High purity 2. Stability (low reactivity) 3. Low hygroscopicity and efflorescence 4. High solubility (if used in titration) 5. High equivalent weight 6. Non-toxicity 7. Ready and cheap availability Edta and particularly the sodium salts of EDTA which are frequently used do not fulfill the first requirement. Therefore the solution of EDTA has to be standardised against a known and accepted primary standard.
Is k2cro4 a primary or secondary standard and why?
K2CrO4 is a secondary standard. This is because it is not directly titrated against a primary standard but rather is standardized by titration against a primary standard, such as sodium thiosulfate in iodometric titrations.
Determination of fe3 with EDTA by photometric titration?
Iron (III) ions form a deep-coloured complex with a maximum absorption at about 525nm; this complex is used as the basis for the photometric titration of iron(III) ion with standard EDTA solution.
Why titration with standard hard water is carried out?
Titration with standard hard water is carried out to determine the concentration of calcium and magnesium ions in water samples. By titrating a known volume of hard water with a standardized solution of EDTA, the amount of calcium and magnesium ions present can be quantified based on the volume of EDTA solution needed to reach the endpoint. This helps in assessing the water hardness and determining the appropriate treatment methods for water softening.
Why is disodium salt of EDTA preferred to EDTA?
The disodium salt of EDTA is preferred over EDTA because it is more soluble in water, which makes it easier to handle and use in aqueous solutions. Additionally, the disodium salt has a higher stability in a wider range of pH levels compared to EDTA alone, making it more versatile for various applications.
Why edta is secondary stadard?
EDTA (ethylenediaminetetraacetic acid) is not a secondary standard. It is a chelating agent commonly used as a titrant in complexometric titrations to determine metal ions in solution. The stability and selectivity of EDTA complexes make it a primary standard for this purpose.
What is the standard abbreviation for Iowa?
The standard two letter abbreviation for the state of Iowa is IA.
Is standardising EDTA and creating a standard solution the same thing?
Yes, these expressions are synonyms.
Is EDTA considered as a primary standard?
No. Chemical compounds have to fulfill a number of requirements before they can be classified and used as a primary standard: A primary standard in chemistry is a reliable, readily quantified substance. Features of a primary standard include: 1. High purity 2. Stability (low reactivity) 3. Low hygroscopicity and efflorescence 4. High solubility (if used in titration) 5. High equivalent weight 6. Non-toxicity 7. Ready and cheap availability Edta and particularly the sodium salts of EDTA which are frequently used do not fulfill the first requirement. Therefore the solution of EDTA has to be standardised against a known and accepted primary standard.
Which form of EDTA is soluble in water?
EDTA used analytically is usually the disodium salt Na2H4Y 2H2O (372.24 g/mol), which is .... anyremaining EDTA titrant, Ca standard stock solution, and Zn unknown solution ...
What is secondary standard apparatus What are secondary apparatus?
one is specific
What would be a better alternative to zinc sulphate as a primary standard for EDTA?
A better alternative to zinc sulfate as a primary standard for EDTA titrations is typically disodium hydrogen phosphate dihydrate (Na2HPO4∙2H2O), also known as disodium phosphate. This compound is preferred due to its higher purity, stability, and lower tendency to form complexes with EDTA compared to zinc sulfate.
Why edta enhances the permeability by tris?
I don't know the actual answer.But the below information will help you get a right answer.try to improve/correct the answer: HCl is a secondary standard solution.It is used in acid-base solution.On the other hand,EDTA is dissolved in pH 8.0.That's a perfect match for the HCl.EDTA chelates divalent cations and helps to inhibit DNAse.Thus,it is possible to get intake DNA. arif ashraf-biochem-DU-BD
Is k2cro4 a primary or secondary standard and why?
K2CrO4 is a secondary standard. This is because it is not directly titrated against a primary standard but rather is standardized by titration against a primary standard, such as sodium thiosulfate in iodometric titrations.
HSC is tenth or 12th?
HSC is Higher Secondary Certificate which is 12th standard.....10th standard is called as SSC that is Senior Secondary Certificate.
Determination of fe3 with EDTA by photometric titration?
Iron (III) ions form a deep-coloured complex with a maximum absorption at about 525nm; this complex is used as the basis for the photometric titration of iron(III) ion with standard EDTA solution.
Why titration with standard hard water is carried out?
Titration with standard hard water is carried out to determine the concentration of calcium and magnesium ions in water samples. By titrating a known volume of hard water with a standardized solution of EDTA, the amount of calcium and magnesium ions present can be quantified based on the volume of EDTA solution needed to reach the endpoint. This helps in assessing the water hardness and determining the appropriate treatment methods for water softening.
