MindMap Gallery Instructions for using chemical experimental instruments and test tubes
Test tubes are essential instruments in chemical experiments, and their use requires selecting the appropriate material (such as glass or plastic) and size according to experimental requirements. When heating a test tube, use a test tube holder to clamp it and heat the bottom evenly to avoid sudden temperature changes that could cause the tube to break. When shaking a test tube, use gentle wrist movement to prevent liquid from splashing out. To clean a test tube, use a dedicated test tube brush and detergent, and if necessary, an ultrasonic cleaner. When using test tubes and other chemical experimental instruments, always wear protective glasses and gloves, handle them carefully to avoid breaking, and keep them away from fire sources and flammable materials to ensure experimental safety.
Edited at 2025-01-14 23:30:54