Coordination Chemistry 3 Part 1 Overview Getting Started Techniques Procedure FAQ Full Lab Manual Introduction & Goals Chemistry & Background Key Questions Prelab Problems Safety Procedure In Your Write-up Experiments Index ChemLab Home		Titration of [Co(NH3)5H2O]3+ Accurately weigh about 0.25 g of your cobalt salt on an analytical balance and dissolve it in 75 mL of distilled water. Prepare a buret by filling it with standardized NaOH solution. Set up your pH meter, to prepare for a titration. Record the initial volume of base in the buret. Read the buret to ±0.01 mL and use a reading card. Record the initial pH of the solution, before beginning to titrate. Be sure that your pH meter is calibrated before you begin. You can review the use of a pH meter with the following links. pH meter: analog pH meter: digital In regions of the titration curve where the pH does not change rapidly with added titrant, you can add up to 0.5 mL of titrant between pH readings. Plot your titration curve as you measure it! Near the endpoint, you will need to add titrant more slowly, to see the rapid increase in pH with added titrant. Add titrant dropwise and record the pH with each addition, as you approach the endpoint. Continue to record pH vs. volume titrant into the post equivalence region of the titration curve.
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