Discussion on Titration Experiment
Discussion:
First of all, rinse all the apparatus that being used in the experiment with hydrochloric acid (HCL) then followed with distilled water (H₂O). Then, prepared the saturated calcium hydroxide (Ca (OH) ₂) solution into a filter funnel and filter paper over a second conical flask. Pour 100.00mL of saturated Ca (OH)₂ solution into a beaker and pour the solution through the filter paper by flowing the solution through a glass rod. After that, use a thermometer to measure the temperature of the solution obtained in the conical flask. Fill 29.00mL of HCL in the burette. Use a pipette to transfer 10.00mL portion of the solution into a conical flask and drop 5 drops of methyl orange into it by using a dropper. Then, slowly open the mouth of the burette and allow HCL to flow into the conical flask containing Ca (OH)₂ and methyl orange as the indicator. Titrate the solution until the yellow colour of the solution turns into orange. Repeat the experiment for several times to get the average reading.
The results of the experiment is stated below:- | Rough | Trial 1 | Trial 2 | Trial 3 | Final burette reading (mL) | 37.60 | 36.30 | 36.40 | 36.20 | Initial burette reading (mL) | 29.00 | 29.00 | 29.00 | 29.00 | Volume delivered (mL) | 9.40 | 7.30 | 7.40 | 7.20 | Average volume of acid used (mL) | | 7.30 + 7.40 + 7.20 = 7.303 |
The volume delivered of the acid for the rough reading is more than all the trial reading because the volume of acid transferred into the solution is excess. The colour of the solution has turned from yellow to red. From the rough result, the volume of acid delivered into the solution has been reduced to avoid excess. The colour of the solution has turned from yellow to orange for the first, second and third trial.
Some precaution has to be taken note as the results for the trials are different. Firstly, the eyes of the person that taken the reading for the burette and pipette must be perpendicular to the line of the apparatus
First of all, rinse all the apparatus that being used in the experiment with hydrochloric acid (HCL) then followed with distilled water (H₂O). Then, prepared the saturated calcium hydroxide (Ca (OH) ₂) solution into a filter funnel and filter paper over a second conical flask. Pour 100.00mL of saturated Ca (OH)₂ solution into a beaker and pour the solution through the filter paper by flowing the solution through a glass rod. After that, use a thermometer to measure the temperature of the solution obtained in the conical flask. Fill 29.00mL of HCL in the burette. Use a pipette to transfer 10.00mL portion of the solution into a conical flask and drop 5 drops of methyl orange into it by using a dropper. Then, slowly open the mouth of the burette and allow HCL to flow into the conical flask containing Ca (OH)₂ and methyl orange as the indicator. Titrate the solution until the yellow colour of the solution turns into orange. Repeat the experiment for several times to get the average reading.
The results of the experiment is stated below:- | Rough | Trial 1 | Trial 2 | Trial 3 | Final burette reading (mL) | 37.60 | 36.30 | 36.40 | 36.20 | Initial burette reading (mL) | 29.00 | 29.00 | 29.00 | 29.00 | Volume delivered (mL) | 9.40 | 7.30 | 7.40 | 7.20 | Average volume of acid used (mL) | | 7.30 + 7.40 + 7.20 = 7.303 |
The volume delivered of the acid for the rough reading is more than all the trial reading because the volume of acid transferred into the solution is excess. The colour of the solution has turned from yellow to red. From the rough result, the volume of acid delivered into the solution has been reduced to avoid excess. The colour of the solution has turned from yellow to orange for the first, second and third trial.
Some precaution has to be taken note as the results for the trials are different. Firstly, the eyes of the person that taken the reading for the burette and pipette must be perpendicular to the line of the apparatus