0.80g of impure `(NH_(4))_(2) SO_(4)` was boiled with 100mL of a 0.2N NaOH solution was neutralized using 5mL of a `0.2N H_(2)SO

0.80g of impure `(NH_(4))_(2) SO_(4)` was boiled with 100mL of a 0.2N NaOH solution was neutralized using 5mL of a `0.2N H_(2)SO_(4)` solution. The percentage purity of the `(NH_(4))_(2)SO_(4)` sample is:
A. 82.5
B. 72.5
C. 62.5
D. 17.5

0.80g of impure `(NH_(4))_(2) SO_(4)` was boiled with 100mL of a 0.2N NaOH solution was neutralized using 5mL of a `0.2N H_(2)SO_(4)` solution. The pe

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