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40. 將0.16g K2Cr2O7溶於稀鹽酸,加入過量KI,反應釋出之2I以未知濃度Na2S2O3溶液滴定至終點,恰需Na2S2O3溶液36.0mL,試求Na2S2O3的當量濃度為多少N?(K2Cr
問題詳情
40. 將0.16g K2Cr2O7溶於稀鹽酸,加入過量KI,反應釋出之2I以未知濃度Na2S2O3溶液滴定至終點,恰需Na2S2O3溶液36.0mL,試求Na2S2O3的當量濃度為多少N?(K2Cr2O7 =294g/mol)反應式如下:
(A) 0.09
(B) 0.15
(C) 0.18
(D) 0.30ˉ
參考答案
答案:A
難度:困難0.210526
統計:A(4),B(6),C(5),D(0),E(0)
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