裝NaOH既GLASS BOTTLE口點解會有白色粉末?

In case you use the bottle of NaOH to prepare some chemicals for experiment,
some NaOH left on the bottle mouth, and the bottle mouth is closed with a glass stopper.
Those NaOH left cannot flow back down the bottle because it is trapped.
It goes dry eventually, and left as NaOH(s), which is the white powder you saw!

NaOH(s)的吸濕性極強
不太可能在大氣中乾燥
請重新查明

CO2 react NaOH 出 NaHCO3