1 / 8

Oxidation-Reduction (Redox) Titration of Oxalate in K 3 Fe(C 2 O 4 ) 3 ·3H 2 O

Oxidation-Reduction (Redox) Titration of Oxalate in K 3 Fe(C 2 O 4 ) 3 ·3H 2 O. First things first…. Safety: Put bags away Goggles Lab Jacket Gloves Acidic Reactants! Quiz! LAB!. What is titration anyway?. Using a buret, you can deliver a specific volume of a solution for a reaction

yoshe
Download Presentation

Oxidation-Reduction (Redox) Titration of Oxalate in K 3 Fe(C 2 O 4 ) 3 ·3H 2 O

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Oxidation-Reduction (Redox) Titration of Oxalate in K3Fe(C2O4)3·3H2O

  2. First things first… • Safety: • Put bags away • Goggles • Lab Jacket • Gloves • Acidic Reactants! • Quiz! • LAB!

  3. What is titration anyway? • Using a buret, you can deliver a specific volume of a solution for a reaction • To read a volume in a buret, look at the bottom of the meniscus • Be sure to note the start volume and the final volume. • No bubble in tip!

  4. Procedure WEAR GLOVES! Permanganate will stain • Weigh 0.1g of the potassium trioxalatoferrate into 3 separate 125 or 250 mLErlenmeyers • Make sure to record mass to 0.00Xg (3 significant figures) • Add ~20 mL of 1.0 M Sulfuric acid • Rinse buret with two 5 mL portions KMnO4, and then fill halfway with (X.XX M) KMnO4 • Titration! Repeat for a total of 3 titrations

  5. Actual Titration • Place the Erlenmeyer on a hot plate and stir until it dissolves and temp 80-90ºC • Titrate KMnO4 from the buret, temp >60ºC • Keep stirring • As the endpoint approaches, titrate SLOWLY, drop-wise until the sol’n becomes pink (reaches end-point) • Waste: KMnO4 in buret goes to beaker back hood • Titrated solution goes down the sink

  6. Calculations Moles KMnO4 reduced Moles C2O4 oxidized MW C2O4 Mass C2O4 Weight % Sample mass originally weighed (~0.1xxg)

  7. Everything due before leaving lab • Turn in today: pre-lab with calculations (yellow sheet) • Finish calculations, including % error • Include pages from lab manual if yellow pages are not easy to read • Enter data into computer/spreadsheet • Do initial log in • Password: last 3 digits g number • Then one individual member adds data • Group members: group id is the individual id who entered data

  8. Due Next Class • Freezing point depression quiz and pre-lab • Lab Report: • Data analysis (based upon lab handout “Redox Titration of Oxalate” on chem.gmu.edu/results site) • 1-2 page double spaced discussion/conclusion page • Do not use discussion ?s

More Related