In this lab exercise a solution containing K+ is passed down an ion exchange column containing a cation exchange resin in the acid form. The K+ ions in the solution replace the resin bound H3O+ ions which elute from the column and then are titrated. This means that the column now holds the K+ ions. To use the column again we must "recharge" the column to remove K+ ions. In your Lab Notebook, describe the exact procedure you will follow to "recharge" the exchange column for the next use. A 0.171 gram solution of KxFe(C2O4)yzH2O is dissolved in water and the solution is passed down a column containing a cation exchange resin in the acid form. The eluted solution is then titrated with a standard NaOH solution to the first equivalence point. Experimentally it required 11.71 mL of a 0.132 M NaOH solution to reach the first equivalence point. Calculate the number of moles of K+ in the weighted sample.