Beaker: Used for preparing solutions and dissolving samples, it should be placed on a fiber glass mat during heating to ensure even heat distribution; generally, it should not be allowed to boil dry.

(2) Conical Flasks: For heating treatment of samples and volumetric titration, in addition to the requirements mentioned above, the stopper should be removed when heating the ground glass jointed conical flask. Non-standard ground glass joints should retain the original stopper.

(3) Iodine Bottle: Quantitative analysis using the iodimetric method or other methods that generate volatile substances, as above.

(4) Round (flat-bottomed) flask: Used for heating and distilling liquids; generally avoid direct flame heating and instead use a heat diffuser or various heating baths.

(5) Round-bottomed distillation flask: Used for distillation; also serves as a small-scale gas reactor, as mentioned above.

(6) Bottling: Filling purification water into equipment for cleaning or filling detergents for sediment cleaning.

(7) Graduated Cylinder and Beaker: These are used for approximately measuring volumes of liquids, cannot be heated, should not be used for preparing solutions, and cannot be baked in an oven. Solutions should be added or removed along the wall during operation.