Potassium hydroxide, also known as caustic potash, caustic soda, potassium ash, chemical formula is Koh, has a strong alkaline and corrosive, its use is very wide, in industry is mainly used in the production of potassium salt raw materials, such as potassium permanganate, potassium carbonate, etc.; in the pharmaceutical industry, light industry, dye industry, electrochemical industry, textile industry, metallurgical industry, daily chemical industry, etc., has a large application.

氢氧化钾可溶于水或乙醇，所以氢氧化钾标准溶液就包括其水溶液跟乙醇溶液两种，这两种溶液的区别并不大，主要使其溶剂不同。那么这种氢氧化钾的标准溶液又有什么样的用途呢？

Potassium hydroxide is soluble in water or ethanol, so the standard solution of potassium hydroxide includes water solution and ethanol solution. The difference between the two solutions is not big, mainly due to the different solvents. So what is the use of this standard solution of potassium hydroxide?

从字面上理解，标准溶液指的是具有准确已知浓度的试剂溶液，在滴定分析中常用滴定剂。在其他的分析方法中用标准溶液绘制工作曲线或作计算标准。

Literally, standard solution refers to the reagent solution with accurate known concentration, which is commonly used as titrant in titration analysis. In other analytical methods, standard solution is used to draw working curve or as calculation standard.

因此不难得出它的作用——作为化学实验分析剂，皂化试剂等，还因为氢氧化钾本身的性质，即在空气中易吸收水分而发生潮解，吸收二氧化碳产生碳酸钾，所以它还可以作为二氧化碳和水分的吸收剂。

Therefore, it is not difficult to find out its function as a chemical experimental analytical agent, saponification reagent, etc. it can also be used as an absorbent of carbon dioxide and water because of its own properties, that is, potassium hydroxide is easy to absorb water in the air and deliquescence occurs, absorbing carbon dioxide to produce potassium carbonate.