1g of a sample of NaOH was dissolved in 50mL 0.33M alkaline solution of KMnO_(4) and refulxed till all the cycanide was converted into OCN^(-). The reaction mixture was cooled and tis 5mLportion was acidified by adding H_(2)SO_(4) in excess an dtehn titrated to end point against 19.0mL of 0.1M FeSO_(4) solutio. Calculate%purity of NaCN sample.

1g of a sample of NaOH was dissolved in 50mL 0.33M alkaline solution o

1.	1g of a sample of NaOH was dissolved in 50mL 0.33M alkaline solution of KMnO_(4) and refulxed till all the cycanide was converted into OCN^(-). The reaction mixture was cooled and tis 5mLportion was acidified by adding H_(2)SO_(4) in excess an dtehn titrated to end point against 19.0mL of 0.1M FeSO_(4) solutio. Calculate%purity of NaCN sample.
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