How can you instantly neutralize the action of acid, sulfuric for example?
Alkali. It can be any soda, soap solution, caustic soda, but here you can miss and then you have to neutralize with acid))
Any alkaline medium. Baking soda - Versatile in application. If you constantly work with acids, you must always be on the hook. And in dry form, when acids and their solutions are spilled, you can also use it as an aqueous solution (to help with burns - but after washing with water).
What other answer authors have advised is real, but cannot be "instantaneous" by definition.
In conditions close to critical, only the presence of H20 (water) can "dilute" the situation to the degree of adequacy of the moment. And the more water the better.
But! I would like to mention this as well. All industries related to active acids have their own specific requirements for handling and responding to non-standard cases.
Listening and reading is not prohibited, so listen and read. It would be strange, having received a chemical burn, incompatible with life, to look for ways to prevent it here / (?
It is necessary to neutralize the acid by being alkaline. A bicarbonate soda solution works great. Soda powder, by the way, is in almost all first aid kits. It needs to be diluted with plain water. The acid must first be washed off with plenty of water.