取磺胺二甲嘧啶0.4928g,用亚硝酸钠滴定液(0.1mol/L)滴定至终点时用去17.65ml.
问题描述:
取磺胺二甲嘧啶0.4928g,用亚硝酸钠滴定液(0.1mol/L)滴定至终点时用去17.65ml.
每1ml亚硝酸钠滴定液(0.1MOL/L)相当于27.83mg的磺胺二甲嘧啶,求磺胺二甲嘧啶的百分百含量.
答
17.65*27.83=491.2mg=0.4912g
0.4912/0.4928=99.68%