题目

英语翻译
In order to ensure the quality of products and
make nitrosation reaction complete,excessive sulfuric
acid and sodium nitrite are usually used to make the
starch-KI indicator blue in industrial production proc-
esses.The excess quantity of sulfuric acid and sodium
nitrite can not be avoided by the starch-KI indicator
method.It is important to accurately judge the end of
chemical reaction (3),to save raw materials such as
sulfuric acid and sodium nitrite and prevent the gen-
eration of nitric oxide toxic gases.
In this study,the end-point judgment method
based on starch-KI indicator is improved.In the ex-
periment,we first seal the system and connect U-tube
manometer to the flask,and then heat the system to
the reaction temperature and add sulfuric acid.As the
chemical reaction approaches the end,any changes on
manometer reading could be observed directly.When
the reading of the manometer increases continuously,

提问时间：2022-01-02

答案

为了确保产品的质量和亚硝化反应完成后,过量的硫酸通常使用亚硝酸钠和使淀粉-KI指示灯蓝色在工业生产中PROCS弯.过量的钠和硫酸亚硝酸盐是无法避免的由淀粉-KI指示器方法.重要的是要准确地判断结束化学反应（3）,为了...