When mixing chemicals, which is the correct procedure?

The correct procedure for mixing chemicals is adding chemicals to water. This approach is essential for safety and effectiveness. When chemicals are combined with water, a controlled reaction occurs, allowing for gradual mixing and reducing the likelihood of hazardous situations, such as splattering, which can happen if water is added to concentrated chemicals. This method helps to minimize the risk of exothermic reactions that produce heat and can lead to boiling or splashing.

Using this technique is particularly important when working with acids or other reactive substances, as it ensures that the chemical is diluted properly and that the reaction proceeds in a safer manner. In contrast, mixing chemicals in equal amounts or using them in any random order can lead to uncontrolled reactions, while adding water to highly concentrated chemicals can result in dangerous reactions that cause burns or other injuries. Hence, adding chemicals to water is not just a best practice but a critical safety measure in chemical handling.