The conelike flask was weighted with the balance and the value was recorded. 2 ) The beaker was filled with distilled H2O and the H2O was added into the conelike flask up to the 60 milliliter grade. The dropper was used when H2O degree was nearing the 60 milliliter grade. 3 ) The weight of the conelike flask incorporating H2O was recorded. 4 ) The mass of H2O was found by deducting the weight of conelike flask from the weight of conelike flask with H2O. 5 ) The volume of H2O was found from the mass of H2O.
6 ) Stairss 1 ) to 5 ) were repeated 10 times.
7 ) 60 milliliter was subtracted from each of the deliberate volume of H2O. 8 ) The informations obtained from measure 7 ) were compared with each other and the largest value was taken as the absolute uncertainness of the conelike flask.
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-The volume of H2O poured into the conelike flask was being decided while the uncertainness of the conelike flask. calculated from the experimental volume deducting theoretical volume of H2O. was being investigated. -The same conelike flask and electronic balance was used throughout the experiment to guarantee the consequences were non to be affected by the difference in setup used.
-The volume readings were taken from the underside of the semilunar cartilage of liquid and it was made certain all the liquid was emptied to guarantee accurate reading of volume. – A dropper was used when the H2O degree approached 50 mL grade of the conelike flask to forestall solution from overruning the grade and to guarantee accurate reading of volume of solution. -Only distilled H2O was used in the experiment to entree just consequences in all unit of ammunitions of experiments.
-The uncertainnesss of the balance were neglected because the value ( ±0. 0001g ) was excessively little and has really small consequence on the consequences. -10 sets of informations were taken into history for more accurate consequences. -The experiment was done in room temperature and in an environment of same air current velocity to forestall the experimental consequences from being affected.
-The outside and the upper 1/3 portion of the inside of the conelike flask was wiped dry with tissue paper before every set of experiment was carried out to guarantee accurate measuring of the mass of H2O contained. -The denseness of H2O is assumed to be 1 g/dm? .
The consequence of the experiment has shown that the uncertainness of a 100mL conelike flask is 2mL. Comparing to a 100 milliliter volumetric flask. which has absolute uncertainness of 0. 08mL. a conelike flask is instead unsure and will give inaccurate consequences. This explains why a conelike flask is normally used for keeping chemicals ( for illustration in titration. it is used for incorporating the solution being titrated against and the index ) alternatively of used for giving measurings.
In this experiment. an observation was that the value displayed on the balance fluctuated within 0. 0004 g. This observation was noted as it implied that even though the air current velocity was kept changeless around the environment ( for illustration fans and air conditioner turned off ) . the motions generated by adult male or use of balance had minor consequence on the truth of the consequence.
The consequence of these little mistakes on the consequence can be eliminated by transporting out more unit of ammunitions of the experiment. or by reiterating with different electronic balances. Further probe could be done on happening the values of uncertainness of different sizes and classs of conelike flasks. By reiterating the experiment with different sizes and classs of conelike flasks. we can derive understanding in different instruments and the consequence might be used as mention in future experiments affecting conelike flasks.
