Determination of Cl and I in Water

Determination of Chlorine and Iodine in Water
Purpose:
The advise of this lab was to determine the come up of chlorine present in tap peeing and single present in an iodine termination. This was done by titrating a atomic number 11 thiosulfate with the tap water and the iodine. Because the assiduousness of sodium thiosulfate changes over time standardization had to be done on the solution to determine the exact concentration of the sodium thiosulfate at the time of the experiment. This was done by victimization a reaction between potassium iodate and sodium thiosulfate solution to determine the exact concentration of the sodium thiosulfate solution at the time of the experiment. Once the solution of sodium thiosulfate had been standardised the megabyte of the solution was known and sodium thiosulfate could be used to measure tap water and an iodine solution to determine the amount of chlorine in the tap water and iodine in the iodine solution.
Procedure/ Observations:
The first step of the experiment was to standardize the sodium thiosulfate solution. This was done by cleaning a 50 mL buret and rinsing it three times with sodium thiosulfate solution to go over the surface of the buret was consistent with the sodium thiosulfate throughout. The buret was then filled with the sodium thiosulfate solution.



The buret was monitored to ensure that the solution extended to the tip of the buret and that no melodic phrase bubbles were present because both would cause an inaccurate titration. The initial al-Quran of the buret was then recorded to the nearest .02 milliliter. A 25 mL pipette was then used to measure precisely 25 mL of the KIO3 solution into a clean 250 mL beaker. 40-50 mL of deionized water was then added to the solution as salubrious as about.5 grams of solid state KI. The solution was stirred until all of the solid KI had dissolved. 2 mL of glacial acetic battery-acid were added to the solution and the solution became yellowish/ brownish in color. The beaker was determined under the...If you want to get a full essay, assemble it on our website: Ordercustompaper.com



If you want to get a full essay, wisit our page: write my paper