Volumetric Analysis Lab Report Example | Topics and Well Written Essays - 1000 words

Volumetric Analysis - Lab Report ExampleThe pink tinge of the dilute MnO4- solution indicates the end of the reaction. This is known as the end point or equivalence point of the titration.The given solution contains a mixture of both(prenominal) Fe +2 ions and Fe +3Assuming that all(prenominal) of the ions is present to at least 30% by mass.Therefore the two different Fe ions present, giving a total of 60% by mass of the mixture of Fe ions.The remaining 40 % of the solution is made up of an acid assuming any acid, think sulphuric acid in this case.Firstly set up ther apparatus as followswithout pouring any contents into either the burette or the volumetrical flask.The mass of iron mixture in the solution is given to be between 1.1g and 1.3g.Given that the volume of the solution is 200cmthe amount (moles) of Fe can be calculated by n=mass/molar massand then the concentration can be found out by rearranging the equation n=CV,to C =n/VTherefore, the mass of Fe taken to be 1.1g and t he molar mass to be 56.The number of moles = 1.1/56 = 0.02 molThe No. of moles for the opposite masses e.g 1.2g and 1.3g can also be found, using the same equation. consequently the concentration can be calculated concentration = 0.02/200=1x10 1x10 / 10001x10-7 work dm-3ProcedureThe concentration of the solution given is found to be 1x10-7 mold dm-3Pour this solution into a volumetric flask.From the volumetric flask note raven the volume of the solution you have.Using a graduated pipette, transfer 20cm3 of the solution into the conical flaskPlace conical flask on top of a white tile. Fill the burette in with potassium permanganate solution, making sure that the tap below on the burette is closed.Record the initial reading on the burette (read the...The pink color of the dilute MnO4- solution indicates the end of the reaction. This is known as the end point or equivalence point of the titration.3. Heat each solution containing the iron sample almost to boiling. SnCl2 solution shou ld be added drop wise taking care such that the yellow Fe(III) color just disappears. Then add only 2 drops excess of SnCl2 solution. The solution is cooled by placing the outside edge under running cold water until held,