In an ion exchange analysis; 25.00mL of a sodium containing magnesium ions was p
ID: 1028011 • Letter: I
Question
In an ion exchange analysis; 25.00mL of a sodium containing magnesium ions was passed through a column of ion-exchange resin, releasing H+ ions. The H+ ions were collected in an Erlenmeyer flask and titrated with a solution of sodium hydroxide. A total of 23.67 mL of 0.0923 M NaOH solution was required to neutralize the H+ collected from the column. In preparing for the analysis, the ion-exchange column is flushed with a solution of HCL, followed by flushing several times with water.
What is the purpose of flushing the column with HCL? Why is the column flushed with water before beginning the analysis
Explanation / Answer
As th column is flashed with HCl, so the H+ ion will sit on the ion-exchange resin bed and it will further participate in the ion-exchange column. Also if some unwanted ions are there, the HCl solution will flush them.
The column is flushed with water to make the ion-exchange resin bed homogeneous with H+ ions that the column will work properly. Also water will dilute any other inorganic ion present in the resin bed and make the column more effective
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