1/18/201443 Chemist reads volume of solution in buret at start of experiment and again at point where indicator changes color –Difference in these volumes represents the volume of reactant delivered from the buret –Controlled addition of a solution of known concentration (titrant) in order to determine concentration of solution of unknown concentration The crucial point about the titration experiment is that the indicator is designed to change color when the amount of reactant delivered from the buret is exactly the amount needed to react with the solution in the beaker (Equivalence Point (Stoichiometric Point)-point in a titration at which the reaction between titrant and unknown has just been completed.) Classic chemical reaction-Fe 2+ and permanganate ion MnO 4 - –5Fe 2+ + MnO 4 - + 8H + Mn 2+ + 5Fe 3+ + 4H 2 O –The purple permanganate ion is the indicator of the point where the correct amount has been added to completely react all of the Fe 2+ ions in the sample
{"Image DocumentName": "Classic chemical reaction-Fe2+ and permanganate ion MnO4-", "Image ImageDescription": "Chemist reads volume of solution in buret at start of experiment and again at point where indicator changes color. Difference in these volumes represents the volume of reactant delivered from the buret. Controlled addition of a solution of known concentration (titrant) in order to determine concentration of solution of unknown concentration. The crucial point about the titration experiment is that the indicator is designed to change color when the amount of reactant delivered from the buret is exactly the amount needed to react with the solution in the beaker (Equivalence Point (Stoichiometric Point)-point in a titration at which the reaction between titrant and unknown has just been completed.) Classic chemical reaction-Fe2+ and permanganate ion MnO4- 5Fe2+ + MnO4- + 8H+ \uf0e8 Mn2+ + 5Fe3+ + 4H2O. The purple permanganate ion is the indicator of the point where the correct amount has been added to completely react all of the Fe2+ ions in the sample. 3/25/2017.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}