A lab evaporating basin with a round bottom is a shallow, circular dish used in chemistry and biology labs to evaporate liquids, usually to concentrate a solution or isolate a solid. The round bottom shape allows for easier stirring and mixing of the liquid, ensuring that the liquid evaporates evenly.

The basin is typically made of porcelain, ceramic or borosilicate glass, and has a flat bottom with rounded sides to allow for easy and even evaporation. It is used in conjunction with a Bunsen burner or a hot plate to gently heat and evaporate the liquid.

The round bottom basin is commonly used for small-scale experiments and can hold a small volume of liquid, usually less than 100ml. The basin can be easily cleaned and reused for multiple experiments, making it a cost-effective and versatile tool for lab work.