問答題準確稱取莫爾鹽Fe(NH42(SO42·6H2O 9.932g,用1mol/L H2SO4準確配成250.0mL溶液。移取釩酸銨溶液25.00mL,加125mL H2O及50mL 濃H2SO4。放冷,加鄰二氮菲指示劑1滴,用Fe(Ⅱ)標準溶液滴定至溶液顏色由綠藍變成紅綠,共需28.59mL。計算NH4VO3溶液的濃度。[Mr[Fe(NH42(SO4)·6H2O]=392.1]

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