What should you do after making a solution?

After making a solution, labeling and dating it is an essential step for several reasons. Labeling provides critical information, such as the contents of the solution, concentration, and any necessary safety precautions. This ensures that anyone handling the solution in the future knows exactly what it contains, helping to prevent accidental misuse or mishandling.

Dating the solution is equally important because it allows users to track its age and determine its viability. Many solutions have a limited shelf life due to factors like degradation or contamination risks. By noting the date of preparation, users can manage the solution's use effectively, ensuring that they utilize it while it is still effective and safe.

While storing in a cool place, testing its pH, or refrigerating immediately might be relevant actions in specific circumstances, they do not address the fundamental necessity for documentation after preparation. Proper labeling and dating create a systematic approach to managing chemicals and solutions which is vital for safety and compliance in any laboratory or relevant context.