摘要
根据滴定终点与化学计量点不一致而导致终点误差这一原理,推导出氧化还原滴定的终点误差公式。并根据此公式分别计算了用K2Cr2O7滴定Fe2+以二苯胺磺酸钠作指示剂时加入H3PO4和不加入H3PO4的终点误差,用具体数据说明加入H3PO4后可减小此滴定的终点误差。
The formula of final error in the oxidant reduction titration is deduced according to the principle that the inconsistency of titrating final and chemical calculating point leads to the final error. Based upon it, the final errors of titrating K_2Cr_2O_7 into Fe^(2+) are calculated with adding H_3PO_4 or not, through the indicator and in detail explain the probability of minor final error for the addition of H_3PO_4.
出处
《达县师范高等专科学校学报》
2004年第2期41-42,共2页
Journal of Daxian Teachers College
