Before a burette is used, it needs to be cleaned. During the cleaning process, usually, water is introduced into the burette. Be the water clean or not, if the burette is then used without rinsing it with the solution that it is going to be filled with, the result of that analytical exercise will not be precise and accurate. The reason is that water residue in the burette would dillute the solution when it's filled in the burette which would make it impossible to determine the exact concentration of the solution moved by the burette. By rinsing and re-rinsing the burette several times with the solution it is going to be filled with, residue water from the cleaning process would be successfully removed from the burette as are other leftover substances from the cleaning process. This practice is quite important as basic analytical technique.
This is to avoid contamination. If the burette were rinsed with water and then filled with the solution, the solution in the burette would be of different concentration than it was filled with.
Sodium hydroxide acts as the titrant in some reactions, particular acid-base reactions where phenolpthalein is used an an inicator of the equivalence point, this is so because phenolpthalein is colourless in acid an pink in base. As the NaOH is titrated against the acid it will easier to see the colour change go from colourless to faint pink rather than from pink to colourless. So to avoid titration errors the NaOh is placed in the burette
so that any residual water or any other solvent used to clean the burette doesn't decrease the original concentration of the solution you want to fill in the burette. hence it is rinsed with the same solution with which it is to be filled
It doesn't necessarily have be rinsed with NaOH, but rather whatever you are going to be putting in there during titration. Is you were going to fill the burette with HCl for example, then you would rinse it with that. It's done in order to stop contamination in your titration, which could lead to impurities and an incorrect titer value.
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Because then you would carry your previous measured solution to your next measuring.
This results in contamination.
In layman's term, contamination = bad
This is to avoid contamination from residue still inside the burette. If another solution is used, that rinsing solution could dilute or contaminate the liquid being tested.
The purpose of this operation is to avoid any contamination of samples.
The burette must be prerinsed with a titrant solution to avoid any contamination.
The purpose is to delete any other impurities.
It is a rule of safety in chemistry: to remove any micro-drops of water from the pipette.
Rinse with distilled water and blow dry with compressed air.
Any fluid!!! It is like a pipette, however, it is usually more accurate because you can use a burette loader which allows fine tuning of the liquid but not as fine as a gilson pipette. Basically, it is just a piece of apparatus used measuring liquids.
The measure of volume used in the titration will be inaccurate, because there will appear to be more titrate used than has actually been dispensed.
Pretty much nothing. A metathesis reaction would give the same products as you had before the reaction, so there's really not much that CAN happen.
It is a rule of safety in chemistry: to remove any micro-drops of water from the pipette.
No. It's not completely necessary.
No, it is not necessary. If you have only the hub plugged in, the computer will boot completely normally.
It is important to remove the filter funnel before adjusting the level of the burette so as to prevent the residual drops of the reagent from dripping into the burette. Which can lead to inaccurate volume readings.
Rinse with distilled water and blow dry with compressed air.
You would be lead to assume that there was more NaOH in the pipet than there actually was. Since when for example the pipet reads 10ml this is talking when the space in the burette is also filled up. When it is that the reaction takes place between the NaOH and acetic acid you would think that you used more NaOH than you really did, which will ultimately make you think more acetic acid was in the vinegar than was in fact.
Any fluid!!! It is like a pipette, however, it is usually more accurate because you can use a burette loader which allows fine tuning of the liquid but not as fine as a gilson pipette. Basically, it is just a piece of apparatus used measuring liquids.
It is not necessary.
Not necessary but extremley recommended
dispersal
The measure of volume used in the titration will be inaccurate, because there will appear to be more titrate used than has actually been dispensed.
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