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1·The resulting solution was cooled on an ice bath and 130 ml of concentrated hydrochloric acid was added drop wise.

将得到的溶液在冰水中冷却，并将130毫升浓硫酸逐滴滴入。

2·The resulting solution was cooled on an ice bath and 130 ml. of concentrated hydrochloric acid was added drop wise.

将得到的溶液在冰水中冷却，并将130毫升浓硫酸逐滴滴入。

3·Especially, dichlorosulfoxide, concentrated hydrochloric acid and other halogenated reagents have caused severe damage to the environment.

尤其是用二氯亚砜、浓盐酸等做卤代试剂时，对环境污染更加严重。

4·When TTA is used to extract zirconium in uranium, the combination of zirconium and TTA is very strong, the concentrated acid of nitric acid and hydrochloric acid can not destroy their combination.

用TTA萃取分离铀、锆时，TTA对锆的螯合作用很强，硝酸和盐酸的浓酸溶液并不能破坏它们之间的整合，即对锆的反萃取非常困难。

5·The direct titration of pyridine with aqueous standard solution of hydrochloric acid in the presence of concentrated neutral salts have been studied.

本文对浓中性盐存在时，用盐酸标准溶液直接滴定吡啶进行了研究。

6·White crystal or offwhite powder, undissolving in water or alcohol, dissolving in concentrated sulphuric acid or hydrochloric acid or ammonia or potassium iodide.

白色结晶或灰白色粉末，见光易分解变成棕黄色。不溶于水和乙醇。溶于浓硫酸和盐酸，亦溶于氨水、碘化钾。

7·When the concentrated ammonia is used to renew the amine which has extracted hydrochloric acid, the renewed amine could be used circularly.

萃取了盐酸的有机胺用浓氨水再生，再生后的有机胺可以循环使用。