CHEM 1102 Lecture Notes - Lecture 2: Volumetric Flask, Nitric Acid, Equilibrium Constant
29 Dec 2015
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Objective: determine equilibrium constant, kc, for the formation of the complex fe(scn)2+(le chatelier"s principle demonstrated) *never pipet a solution directly out of container always pour solution into beaker before pipeting to avoid contamination. *read labels carefully to pick the right concentration of fe(no3)3. You and your partner(s) will be assigned to make a standard solution from the table. Label the beaker: rinse a measuring pipet with this solution and add enough 0. 500m. Hno3 to each test tube so that the total volume is equal to 10. 0ml (3, 2, or 0 depending on the volume of 0. 00200m fe(no3)3 in 0. 500m. *when using measuring pipet, the liquid is not drained to the tip. Flow of liquid is stopped when the desired calibration mark is reached. Delivered volume is taken as final reading initial reading: with glass stirring rod, mix each solution thoroughly. Be sure to dry off the rod each time after stirring each mixture.
