|
|
This is only a preview of the paper
Click here to register and get the full text.
Existing members click here to login
|
|
|
... 65g
Apparatus
• Burette (for an accurate titration) and stand.
• Weighing scale (to weigh solid Na2CO3)
• Small funnel to fill burette (to prevent wastage of solution)
• White tile (used to easily recognize colour change in titration)
• Bromophenol blue indicator (5 drops) ( for colour change to occur)
• Anhydrous Sodium Carbonate (2. ...
It is important that in carrying out the titration the correct indicator is used. ...
Carrying Out Titration. ...
Rough Titration
8. ... 00 cm3 of solution from burette to flask whilst shaking flask as soon as a colour change appears in conical flask solution, STOP TITRATION, and record the final reading on the burette. ...
Accurate Titration
9. ...
• Repeat the titration with another unused aliquot (fresh sulphuric acid and indicator). ...
• This time be extremely careful especially when approaching the end, which should be roughly clear from the rough titration. ...
• Repeating the titration until concordant titre within a difference of +0. ...
The number of titration depends on when two concordant results have been achieved to +0. ... 15 mol dm-3 that implies that there must have been experimental errors, resulting from the precision of the equipment used whilst carrying out the titration, and human error. Carry out the titration, and waiting for the point at which the bromophenol indicator in the sulphuric acid turns colour is a matter of opinion, therefore adding to uncertainty of the experiment? ...
It is possible to notice the titre value was too large due to the colour of the acid being very dark after the rough titration was completed. So a rough titration is necessary to ensure more accurate result. ... Another rough titration would have been an improvement to procedure to see what to expect and how to carry out the accurate attempt.
Approximate Word count = 2385
Approximate Pages = 9.5
(250 words per page double spaced)
|
|
|
|
|
|