Five gram of copper alloy was dissolved in one litre of dilute H_(2)SO_(4). 20 mL of this solution was titrated iodometrically and it required 20 mL of a hypo solution. 20 mL of K_(2)Cr_(2)O_(7) which contained 2.4 g per litre, in presence of H_(2)SO_(4) and excess of KI, required 30 mL of the same hypo solution. Calculate the % purity of copper in the alloy.

Five gram of copper alloy was dissolved in one litre of dilute H_(2)SO

1.	Five gram of copper alloy was dissolved in one litre of dilute H_(2)SO_(4). 20 mL of this solution was titrated iodometrically and it required 20 mL of a hypo solution. 20 mL of K_(2)Cr_(2)O_(7) which contained 2.4 g per litre, in presence of H_(2)SO_(4) and excess of KI, required 30 mL of the same hypo solution. Calculate the % purity of copper in the alloy.
Answer» SOLUTION :N//A