What can't be done with a rubber stopper?
Concentrated sulfuric acid is dehydrated and should not use cork;Benzene and toluene and other organic reagents and KMnO4, HNO3, H2SO4, FeCl3, concentration of bromine, chlorine and other strong oxidizing agents will be swelling rubber plug, or the carbon carbon double bond oxidation in rubber, and therefore can not be used rubber plug.
Cork usually has glass stopper, rubber stopper and corkNaOH, Ca (OH) 2, Ba (OH) 2, Na2SiO3, Na2CO3, NaAlO2 and other alkaline reagents, because it is easy to make glass corrosion into a strong viscosity of water glass, a kind of material, stick to the glass stopper, so can not use glass stopper;
