The calcium contained in a solution of 1.048 gm of the substance being analysed was precipitated with 25 ml of H_(2)C_(2)O_(4). The excess of C_(2)O_(4)^(2-) in one fourth of the filtrate was back titrated with 5 ml of 0.1025 N KMnO_(4) solution. To determine the concentration of the H_(2)C_(2)O_(4)solution taken , it was diluted four fold , the titration of 25 ml of the dilute solution used up 24.1ml of KMnO_(4) solution . What is percentage of CaO in the substance being analysed .

The calcium contained in a solution of 1.048 gm of the substance being

1.	The calcium contained in a solution of 1.048 gm of the substance being analysed was precipitated with 25 ml of H_(2)C_(2)O_(4). The excess of C_(2)O_(4)^(2-) in one fourth of the filtrate was back titrated with 5 ml of 0.1025 N KMnO_(4) solution. To determine the concentration of the H_(2)C_(2)O_(4)solution taken , it was diluted four fold , the titration of 25 ml of the dilute solution used up 24.1ml of KMnO_(4) solution . What is percentage of CaO in the substance being analysed .
Answer» SOLUTION :N/A