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.

氫氧化鉀可溶于水或乙醇，所以氫氧化鉀標準溶液就包括其水溶液跟乙醇溶液兩種，這兩種溶液的區別并不大，主要使其溶劑不同。那么這種氫氧化鉀的標準溶液又有什么樣的用途呢？

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?

從字面上理解，標準溶液指的是具有準確已知濃度的試劑溶液，在滴定分析中常用滴定劑。在其他的分析方法中用標準溶液繪制工作曲線或作計算標準。

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.

因此不難得出它的作用——作為化學實驗分析劑，皂化試劑等，還因為氫氧化鉀本身的性質，即在空氣中易吸收水分而發生潮解，吸收二氧化碳產生碳酸鉀，所以它還可以作為二氧化碳和水分的吸收劑。

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.