I need to write an essay on Standardisation of Hydrochloric Acid with Sodium Carbonate
(1.25g sodium carbonate)
(0.1mol dm-3 HCl)
(25cm3 distilled water)
Info:
- weigh out accurately between 1.20-1.30g of anhydrous sodium carbonate
- dissolve in approximately 100cm3 of distilled water
- transfer to a 250cm3 volumetric flask.
- pipette exactly 25.00cm3 of the Na2CO3 solution into a conical flask
- add a few drops of methyl orange indicator
- with the aid of a funel, carefully fill the burrette with HCl, noting initial reaing, [record the burette reading to 2 d.p making the d.p either a 0 or 5]
- carefully add HC from the burette to the conicol flask with swirling
- add HCl drop by drop near end point, using white tile to help observe a sharp colour change (end point is an orange colour)
- record final burette reading.
- repeat until three consistamt titres have been recorded
Essay:
Standardisation of Hydrochloric Acid with Sodium Carbonate is a process used to determine the exact concentration of hydrochloric acid in a solution. This is done by titrating the hydrochloric acid with a known concentration of sodium carbonate. The process involves accurately weighing out between 1.20-1.30g of anhydrous sodium carbonate, dissolving it in approximately 100cm3 of distilled water, and transferring it to a 250cm3 volumetric flask. Then, 25.00cm3 of the Na2CO3 solution is pipetted into a conical flask, and a few drops of methyl orange indicator are added. With the aid of a funnel, the burette is filled with HCl, noting the initial reading. The HCl is then carefully added to the conical flask with swirling, and added drop by drop near the end point, using a white tile to help observe a sharp colour change. The final burette reading is recorded, and the process is repeated until three consistent titres have been recorded. This process is important for ensuring the accuracy of the concentration of hydrochloric acid in a solution, and is used in many laboratory experiments.