Question Completion Status 7 8 6 9 10 5 2 3 4 Titration Equation H3c6h507 Aq 3 Naoh Aq Na3c6h507 Aq 3 H 20 Aq 1 (125.28 KiB) Viewed 60 times
Question Completion Status: 7 8 6 9 10 5 2 3 4 TITRATION Equation: H3C6H507(aq) + 3.NaOH(aq) Na3C6H507(aq) + 3•H 20(aq) What was the physical change in the solution at the molecular level at the end point of the titration? O the physical change is that the citric acid is half-ionized 02 the physical change is that the citric acid has fully deprotonated into its ionized form 03 the physical change is that all forms of citric acid have been removed from the solution the physical change is that the citric acid has re-protonated into its un-ionized form
Blackboard Remaining Time: 1 hour, 07 minutes, 58 seconds. Question Completion Status: 2 3 5 6 7 8 9 10 Question 2 5 points Save Answer Experiment #6: Question #2 - Estimating the Acid Content of Fruit Juices (5 points) In order to find the end-point of a titration sometimes we: (1) use an organic compound called an "indicator”, which visually changes color at the end point of the titration (2) graphically plot the pH using the data from a digital pH meter, and use the shape of the curve to find the end point of the titration. At the end point of the titration we are alerted to a change in some physical property of the solution by the color change of the organic indicator (in our lab: phenolphthalein). The change in color tells us that something has happened to the weak acid or the weak base that we were titrating. TITRATIONSustion. 2 NA
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