Respuesta :
Stirring rod is used to mix combinations of materials and to assist in the pouring of liquids.
A laboratory tool used to mix chemicals is a glass stirring rod, also known as a glass rod, stirring rod, or stir rod. Typically, they are constructed of solid glass, about the same thickness and length as a drinking straw, and have rounded ends.
When decanting supernatants, appropriate laboratory procedure calls for the use of stirring rods because the contact serves to reduce the adhesion between the side of the glassware and the supernatant, which is what causes the liquid to run down the side. Additionally, using a stirring rod gives you more control over the velocity of flow, which is crucial when working with chemicals that could react violently.
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