e following equipment from highest procision to lowes procision in mesuring volu
ID: 230100 • Letter: E
Question
e following equipment from highest procision to lowes procision in mesuring volume Look at one of each piece of equipment and determine how many significant figures can be obtained lind tber the last significant figure is estimated between the graduations) Equipment Beaker Buret 100mL Graduated Cylinder Precision Rank (1,2,3) where 1-Highest 2 CRITICAL THINKING OUESTI titrations whose eff start again anyway. Think more deeply about the experiment that you have perjorime words...why would it not be good technique to have to refill the buret DURING a titration? Why do you think the instructions told you not to leave the funnel in the buret during the titration? 2. Having completed a series of titrations, list several errors that might occur or might have occurred in your ects can be reduced by repeating the determination over several trials (Hint: Think carefully about every aspect of performing the titration and any problems that encountered. Don't waste your time with trivial problems like spilling problems like spilling the sample that would have required you to 3. Why do you think the instructions call for you to maintain a full buret at the beginning of each trial? In other 4. done to provide enough volume to be able to work with and see well and to make sure that all of the titrant was in solution instead of stuck to the side of the flask. If the calculation of molarity is based on moles of solute per liter of solution, why is it acceptable to add this extra water without worrying about it in calculations? t multiple points in the procedure you were advised to add water to the flask you were titrating into. This was
Explanation / Answer
1) the precision you have maked is correct
2) You should be carefull about making the burret to zero, look for the lower miniscus to be in zero a small chance can vary the titration value
Be careful at the end point. dont titrate it in a hurry, do it slowly like that at a single drop the colour change should occur
Always during titration, near to the end point shake the titrant very well for each drop to get the end point correctly at a one drop, or else chances of error is more
3) Its better to refell it because when we memmorize the last point other than zero, there as possibilities that you may forget it, because it may be decimals and all. and also when we are setting to zero we can correctly set the lower miniscus to zero. other than zero the other points have chances of more error
4) it funnel is there the air which gets into the buret during titration may gets slow, as a result the flow of liquid will be slow and it will be difficult to get the correct end point. When the funnel shakes the air flow to burett increases and it makes titration very uncomfortabe and precisionless
5) adding water will change the volume, but wont change the no. of moles in the flask. The titration is base on amount of moles that we need to neutralize. so it is acceptable to add water .
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