Potassium hydroxide and sodium hydroxide are bound to deliquesce under ordinary laboratory conditions. Deliquescence is faster in the state of crushing, so it is impossible to weigh accurately. Therefore, if you want to crush flake potassium hydroxide just for accurate weighing under ordinary conditions, you don't have to consider it.

方法 #1 在干燥氣氛下操作，簡單的就是在惰性氣體保護下的手套箱或者手套袋里稱量；

The method #1 is to operate in a dry atmosphere. The simplest way is to weigh in a glove box or glove bag under the protection of inert gas;

#2 考慮到氫氧化鉀一般在溶液中使用，那么可以稱取大致的量，溶解于相應的溶劑中，然后用滴定的方法確定真實濃度，滴定的具體流程需要根據溶劑的種類確定，相關信息網上有大量可以獲取，另外，注意密封容器以保護溶液不被空氣中的二氧化碳所破壞；

#2 considering that potassium hydroxide is generally used in solution, the approximate amount can be weighed and dissolved in the corresponding solvent, and then the real concentration can be determined by titration. The specific process of titration needs to be determined according to the type of solvent, and a large amount of relevant information can be obtained on the Internet. In addition, pay attention to sealing the container to protect the solution from being damaged by carbon dioxide in the air;

Plan B：如果你足夠大條地覺得10%以內的誤差可以接受（俺大條地趕腳其實一般都可以啦），那就弄個spatula搗搗碎（注意不要吸入氫氧化鉀粉末哦，很嗆人的）再快速稱量吧。

Plan B: if you think the error of less than 10% is acceptable (I can generally catch up with my feet), make a spatula and mash it (be careful not to inhale potassium hydroxide powder, which is very choking) and then weigh it quickly.