After using the concentrated sulfuric acid, immediately plug the bottle stopper, because?
Concentrated sulfuric acid has water absorption, will absorb the water vapor in the air, thus thinning. Long term can lead to error. (usually calculated at 98% factory time)
Prevent free air from producing mist.
Concentrated sulfuric acid has a strong water absorption, to prevent excessive absorption of water in the air become thin, affecting the use of.
