用KIO 3 基准物质标定Na 2 S 2 O 3 溶液。称取0.2001gKIO 3 与过量KI作用。析出的碘用Na 2 S 2 O 3 溶液滴定,以淀粉作指示剂,终点时用去27.80mL。问此Na 2 S 2 O 3 溶液浓度为多少?此Na 2 S 2 O 3 溶液对碘(I 2 )的滴定度是多少?[M(KIO 3 )=214.0g·mol -1 ;M(I 2 )=253.8g·mol -1 ]
【单选题】Banked cloze Fill in the blanks by selecting suitable words from the word bank. You may not use any of the words more than once. A. abundant B. superficial C. tedious D. a...