精密量取维生素C注射液4mL(相当于维生素C0.2g),加水15mL与丙酮2mL

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问题 精密量取维生素C注射液4mL(相当于维生素C0.2g),加水15mL与丙酮2mL,摇匀,放置5分钟,加稀醋酸4mL与淀粉指示液1mL,用碘滴定液(0.1mol/L)滴定至溶液显蓝色,并持续30秒钟不退。已知:注射液规格2mL:0.1g,消耗0.1mol/L碘滴定液(F=1.005)22.45mL,维生素C的分子量为176.12。计算含量和滴定度(T)A.49.67%,T=8.806gB.4.97%,T=176.12mgC.198.7%,T=88.06mgD.99.34%,T=8.806mgE.49.67%,T=17.612mg

选项 A.49.67%,T=8.806g
B.4.97%,T=176.12mg
C.198.7%,T=88.06mg
D.99.34%,T=8.806mg
E.49.67%,T=17.612mg

答案 D

解析
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