What is created when caustic substances are combined with water?

When caustic substances, which are typically strong bases like sodium hydroxide or potassium hydroxide, are combined with water, a highly exothermic reaction occurs. This means that a significant amount of heat is generated during the process. As the caustic substance dissolves in the water, the heat can cause the water to vaporize quickly, leading to the formation of steam. This is especially important to note because the rapid generation of heat can present safety risks, including burns or the potential for boiling over if not handled correctly.

In this context, understanding the characteristics of caustic substances and their reactions with water is crucial for safe handling and for properly mitigating any hazards that may arise from such exothermic reactions.