CHEM-C 127 Lecture Notes - Lecture 10: Spectrophotometry, Thiocyanate, Reagent
Document Summary
Learning goals: determine equilibrium constant for reaction between 2 reactants, apply concepts of le ch telier"s principle, use spectrophotometry to measure equilibrium concentrations of a product. Safety: wear gloves while wearing metal salt solutions. Potassium thiocyanate toxic to a degree: discard any chemicals in hood in appropriate labeled waste containers, nothing should go down sink- even when rinsing glassware slow fast, kinetics: Step 2: equilibrium involves all steps, not just rate-determining. Reaction for lab: (cid:4666)(cid:4667)+(cid:2871) +(cid:1829)(cid:4666)(cid:4667) (cid:4666)(cid:1829)(cid:4667)(cid:4666)(cid:4667)+(cid:2870: use ice tables. Class will create calibration graph; product not stable because reaction is equilibrium their original molarities because volume of solution doubles. Reagents almost colorless, product colored- put product in spectrophotometer, measure. Note: when given reagent molarities, notice that the two solutions dilute each other to half of.
