Phenolphthalein was used as the indicator in this experiment because it is clear in acids, and begins to turn pink around a neutral PH. Next, the initial volumes for the acid and base were recorded.
The factors that contributed to the inaccuracy of the experiment are the following: Therefore the balance did not have a very good precision and would give a percentage error in the reading. One possible source of error for this experiment could have been the fact that qualitative data was collected.
How to cite this page Choose cite format: The positive terminal of the battery should be toward the cell.
An experiment will take place producing aspirin Acetylsalicylic acid from Salicylic acid and acetic anhydride. This could have impacted the data by causing the read volumes to be different from what they are supposed to be. Acid-base naturalization Is when an acid and base are mixed In order to form water and a salt, resulting In a neutral solution.
Then it will be discussed as to why the yield produced are the same or different and also why the melting point are the same or different. In this case a data section has been provided by the instructor.
In this experiment, we will work with the enzyme amylase. An electrolytic cell requires an external source of energy. If the reaction has not fully completed then the Aspirin formed would not be pure, as it would contains unreacted reactants.
I did this experiment three times changing the capillary tube each time and got At the bottom of the flame, where it is clear, we collected unburned wax. Therefore, the faster the blue color of starch is lost, the faster the enzyme amylase is working.
Naturalization Is also a major principle. Before starting the experiment, read the COSHH analysis sheets for each of the chemicals that are going to be used in the experiments.
Although this sounds far fetched it was still a flaw in the experiment. At the equivalence point, the number of moles of acid equals the number of moles of bases.
The mass of salicylic acid that was provided was 50g. As a heater was used it was not possible to select the maximum temperature required.
Any information that is included in the report will be referenced at the end. MM and the other to being 0. The original data and obtained data are revealed, and then they are discussed with thorough interpretations along with conclusions made, as well as recommendations.
If the meter gives a negative reading, the battery terminals should be reversed. As a result it had to be assumed they were correct. What are the major differences between your experimental process and the process most widely used in industry. Therefore you should get a temperature range of the aspirin Hazard and Risk Analysis: This could be reason as for why the there was a great temperature difference in the melting points of aspirin, The solubility of aspirin in water varies with temperature.
This could have been a reason as to why the yield was not very accurate. The soaked end of one of the metallic splints was then dipped in one of the metallic salts.
Then insert an inverted closed end capillary tube into the test tube. During titration, phenolphthalein can be added to an acid. If I was to repeat this experiment I would use the volumetric pipette since it is the most accurate out of the three.
The copper sulfate solution may be returned to the original bottle. Using a round-bottomed Quick-fit flask mix the measured Salicylic acid and the acetic anhydride together. Then place the beaker into a warm and dry place and leave for 24 hours.
Hire Writer Pipette and burette: The third experiment we did was to find out whether water was really a product of the combustion reaction. Watching H2O change phases took longer than I though!. 38 rows · A beaker is a generally cylindrical container with a flat bottom.
Most also. This is not an example of the work written by our professional academic writers. Goggles. Ice. Steel wool. metal strips, wash with distilled water after and wipe dry with a towel.
Place 60 mL of the 1 M ZnSO 4 solution in a mL beaker. Place a strip of polished zinc in the beaker. More Essay Examples on Oxygen Rubric. candle matches safety goggles lab handout & pen ruler watch glass mL beaker CO2 indicator solution (limewater) 50 mL.
Get custom essay sample written according to your requirements. urgent 3h delivery guaranteed. This lab requires the use of goggles because there is potential of accidental debris (e.g. sand, salt, iron filings, pebbles) entering the eyes.
A mL beaker was used to hold the mixture. First, the pebbles were inserted. Then, the sand. Pour about 35 mL of the copper sulfate solution into the 50 mL beaker. Place the copper electrodes in the solution, and adjust them so that they do not touch each other.
5. D) Set the extra 5 ml aside in a labeled beaker and ask the teacher for advice. 9. Chlorophyll can be removed from leaves by boiling them in alcohol, a flammable solvent.Goggles and ml beaker essay example