Titrations

Titrations are used to measure the concentration of an unknown solution using a known solution while tallying the volumes. Several types of these include acid-base titrations, red-ox titrations, colorimetric titrations and gravimetric titrations.

1,798 Questions
Titrations

What equipment is used in titration at school?

A burette, a stand, indicator fluid, an Erlenmeyer flask, an acid and a base.

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Periodic Table
Titrations

What are the principles of soxhlet extraction?

The solvent used depends on its polarity. As the solvent boils the vapour passes through the condensor and the pure form of the solvent drops on the sample

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Titrations

Why are multidentate ligands preferred to unidentate ligands in complexometric titrations?

Entropic advantage:

[Cu(H2O)6]2+ + EDTA <==>> [Cu(EDTA)]2+ +6H2O

Count your moles: Left side, 2 moles. Right side, 7 moles.

The universe like to move from order to disorder. :-)

Think of the occupy wall street people who would be happier if money all bundled up in some rich person's bank was distributed to the poor...The second law of thermodynamics applied to politics!

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Titrations

What is the function of starch solution in the redox titration?

It is used as indicator for the endpoint of a Iodometric (redox) titration: it gives a bluish grey to black color with very minute excess of Iodine-iodide ions (I3-)

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Titrations

How do you get sharp end point in acid-base titration?

It is only possible if acid or base is very strong or both are strong secondly the proper indicator with proper concentration must be used.

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Titrations

What is a titration?

A titration is the use of carefully measured amounts of a known solution to determine the concentration of another. They often involve acid-base neutralisation or oxidation-reduction reactions (examples would be sodium hydroxide with hydrochloric acid, or permanganate with an iron solution). The main part of the system is the burette, a large graded tube with a controllable variable nozzle at its end. This nozzle is used to add different amounts with great precision to the solution being tested, so that an exact reading can be made - if done correctly, the titration's accuracy is limited only by the scale on the burette. A sample of the test solution (collected using a pipette with a known volume and high degree of accuracy; the sample is called an aliquot) is placed in a container, usually a conical flask, under the burette. The burette is filled with known solution, i.e. one where the concentration is know to another high degree of accuracy. The two are mixed slowly and allowed to react - for acid-base titrations an indicator will be added to the flask, for redox the solution which will change colour is put in the burette. This is continued slowly until the solution will barely react with that from the burette. At this point the amount of solution taken from the burette is recorded. Ideally, the next slightest drop of burette solution will cause a change in colour of the solution that does not change at all. If not, the new recording is made and the last step repeated. This amount is a titre. The whole experiment is repeated several times. The data is collected and averaged out. From this, an amount of known solution used, an amount of tested solutio used and eventually a concentration can be found.

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Scientific Method
Titrations

What are different types of indicator used in titration?

phenolphthalein is one i know.

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Titrations

What is the formula for titration?

Vr * cr = Vt * ct ==>Actually this is only true for an one-to-one molecular reaction,

otherwise it should be corrected for a well balanced titration reaction

Thus:

cr = [ Vt * ct ] / [ Vr ]

in which:

V = volume (ml) (Vr is mostly the exactly pipetted volume of the 'unknown' solution)

c = concentration (mmol/ml) (cr is mostly the 'unknown' conc.)

index r = reactant (to be analysed)

index t = titrant (compound reacting with reactant)

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Titrations

What are Masking and demasking agents in complexometric titrations?

cyanode

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Titrations

Why must have gross reading in titration process?

to get rough volume....

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Titrations

Why ac current is used in conductometric titration?

Because if DC is used, solution undergoes electrolysis and the products of electrolysis set up a back emf which opposes the flow of current

-s

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Titrations

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=

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Titrations

What is over-titration?

titration with out the analyte is called…….?

A. Blanck titration B. Direct titration C. A and B D.All

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Chemistry
Acids and Bases
Titrations

What is methyl orange?

Methyl Orange is an indicator that is used to indicate the equivilance point of and acid-base titration. In acidic environments, it turns red and in basic environemnts, or pH of 4.4 and higher, it turns yellow. It is prepared by treatment of helianthine with sodium hydroxide , helianthine is obtained by coupling diazotised sulphanilic acid with N,N-dimethylaniline .

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Titrations

What measuring instrument is used in titration?

Titration involves the use of a buret and also an Erlenmeyer flask or beaker (where it is measured).

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Titrations

What is the significance of sorenson's formol titration?

The titration gives the amount of amino acid or proteins (hydrolysis of protons generators amino acids) present in a food or cattle or poultry feed.

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Titrations

Who uses titration in a workplace?

A chemist working in a laboratory will use titration, which is an analytical process to measure the amount of a substance dissolved in liquid. Normally the chemist would be described as an Analytical Chemist.

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Titrations

What is the basic technique or basic principle of amperometric titration?

The potential applied between the indicator electrode and the reference electrode is kept constant and the current through the electrolyte cell is then measured on addition of each increament oftitrating solution.

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Titrations

Precise volumetric equipment used in titrations?

i think the right answer would be burets or berets

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Chemistry
Paleontology
Periodic Table
Titrations

What are the features of the periodic table?

The periodic table is arranged in the order of increasing atomic numbers of the elements. It starts from an alkali metal and end at an inert gas. The next element is again an alkali metal and is placed just below the previous alkali metal. Sodium (Na), Potassium (K), etc are examples of alkali metals and Helium (He), Krypton (Kr), etc are examples of inert gases.

The horizontal lines of elements form a period and the vertical ones form a group. Elements falling under the same group show similar chemical properties.

Group 1 elements are called Alkali metals they all have one electron in their outer shell, they are the most reactive elements with Lithium been the least and Francium been the most reactive element. The elements are arranged from top to bottom with lithium at the top and francium at the bottom.

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Titrations

What is indirect titration?

indirect titration is a process where in the analyte did not react with the titrant, directly,instead..they are connected with the use of iodine.

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Titrations

In HCl and NaOH titration which indicator is used?

Phenolphthalein indicates red for acids and blue for bases.

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Titrations

How does the equivalence point of a titration differ from its end point?

The equivalence point is the point where the number of moles of base equal the number of moles of acid. The end point is the point where the indicator being used changes color (also 'indication point)'.

If the indicator is chosen correctly, the end point will essentially be exactly as near as possible at the equivalence point.

The point of the titration is to find the equivalence point -- the end point is just a very close approximation to it. This is because the pH of the solution changes very rapidly close to the equivalence point.

Therefore, the indicator will change color very close to the equivalence point because of the steepness of the pH change.

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Titrations

What companies use titration in there work?

Answer Any company who has waste water usually titrates it before allowing it to go to the sewer system. Chemical company's titrate their chemicals and Paint companies titreate certain paints to see how much lead there is in the paint. These are three uses of titration.

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Titrations

Why starch is added in iodometric titration?

The color formed by reaction between starch and iodine is much more intense than the color of iodine itself, so that the end point can be determined more sensitively with than without starch.

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