How should acid and water be mixed in a laboratory?

The correct approach to mixing acid and water in a laboratory setting is to pour acid into water. This method is crucial for safety because when acid is added to water, the water absorbs the heat generated by the reaction, minimizing the risk of splashing and violent reactions.

If water is poured into acid, the heat generated can cause the mixture to bubble and splash, potentially leading to dangerous situations, including burns or injuries from acid splashes. Pouring acid into water allows for better control, as the acid is diluted gradually, which helps manage the exothermic reaction more safely.

This method is standard practice in laboratory protocols to ensure the safety of the personnel and to handle the chemical reactions appropriately. Understanding the principles behind this practice is essential for anyone working in environments where acids are routinely handled.