0
Want this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
Why is buffer solution used in EDTA method?
Buffer maintains the pH of the solution through out the reaction. To maintain high alkaline medium ammonia buffer is added to EDTA in analysis of hard water. It is necessary to keep the pH at about 10 for two reasons: (a) all reactions between metal ions and EDTA are pH dependent, and for divalent ions, solutions must be kept basic (and buffered) for the reaction to go to completion; (b) the eriochrome black T indicator requires a pH of 8 to 10 for the desired color change.
Who is the doer of metal?
A Black Smith is an example of a metal worker.
What is a black metaller?
A black metaller is a person who is a fan of black metal music.
When a metal powder is heated in open dish it turns black which metal is that?
The metal might be copper. When copper is heated, it reacts with oxygen in air forming copper oxide which is black in colour.
What is a compound that forms metal and non-metals ions when it dissolves in water?
This is typical behavior of soluble salts: metal cations (+) and nonmetal anions (-)
What is role of eriochrome black t in zn-edta titrations?
The indicator added to the sample is Eriochrome Black T. Initially, the indicator will form a complex with the cations. When complexed it is red in color. As the EDTA is added dropwise to the sample, it replaces the Erio T and forms more stable complexes with calcium and magnesium. When the indicator is released by the metal ions, it has a distinct blue color. Therefore, the endpoint of the titration is marked by the color change form red to blue
How does behaviour of EBT changes with changes in pH?
Eriochrome Black T (protonated form) produce a complex with some metal ions.
What is the nature of eriochrome black-t?
Eriochrome Black T is a complexometric indicator that is part of the complexometric titrations, eg. in the water hardness determination process. It is an azo dye. In its protonated form, Eriochrome Black T is blue. It turns red when it forms a complex with calcium, magnesium, or other metal ions. Its chemical formula can be written as HOC10H6N=NC10H4(OH)(NO2)SO3Na.
How do you draw the structural formula for EBT?
Probably you meant: (the only chemical meaning of EBTamong more than 15 ambiguous homonyms)Eriochrome Black TThis is a blue complexometric indicator that turns to red upon the formation of a metal-complex in complexometric titrations. Structural formula: can be found as 'Related link' just right down this answer page.Formula: C20H12N3O7SNa (or HOC10H6N=NC10H4(OH)(NO2)SO3Na)IUPAC name:sodium (4Z)-4-[(1-hydroxynaphthalen-2-yl-hydrazinylidene]-7-nitro-3-oxo-Y-naphthalene-1-sulfonate
Why you use pH 10 buffer in EDTA titration?
It is necessary to keep the pH at about 10 for two reasons: (a) all reactions between metal ions and EDTA are pH dependent, and for divalent ions, solutions must be kept basic (and buffered) for the reaction to go to completion; (b) the eriochrome black T indicator requires a pH of 8 to 10 for the desired color change.
Is malleability a typical metal?
Malleability is not a type of metal. It is a property of metals.
How did black metal get its name?
From Venom's album "Black Metal".
What country did Black Metal originate from?
Really the first black metal band was Venom, from England. But the country most known for black metal is Norway. The black metal bands there defined the genre.
Black tooth twisted metal?
Sorry, but I don't believe there is a black tooth twisted metal, what you must mean is Twisted metal black.
What is a 'pyrocatechol indicator'?
Pyrocatechol indicator is used as an end point indicator for titrating nickel metal in a sulfamate nickel cobalt plating bath. It may also be used for other chemical analysis titrations.
When was Holdin' On to Black Metal created?
Holdin' On to Black Metal was created in 2011.
When was Black Metal Sacrifice created?
Black Metal Sacrifice was created in 1999.
