What type of flask is commonly used for heating liquids and can easily be swirled?

The Erlenmeyer flask is designed with a narrow neck and a wide base, which makes it particularly well-suited for heating liquids. The shape allows for easy swirling of the contents without the risk of spilling, as the narrow neck helps contain the liquid. This design is advantageous when mixing solutions or during experiments where careful manipulation of the liquid is needed to avoid splashes. The use of the Erlenmeyer flask is common in laboratories where heating and mixing are frequently required, providing both functionality and safety during experiments.

In contrast, a volumetric flask is primarily used for making precise dilutions and measurements and typically has a flat bottom that isn’t ideal for swirling. A round-bottom flask is often used for heating and distillation but can be more challenging to swirl effectively due to its shape. The term "baker flask" does not refer to a standard type of laboratory flask and is not recognized in scientific terminology, making it less relevant in this context.