burette

/bjuə'ret/
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burette

A scientist carefully adds a solution from a burette into a flask.

Definition

Noun: 1. A laboratory instrument for precise liquid measurement and delivery: A burette is a long, graduated glass tube with a stopcock (a tap or valve) at its lower end. It is used to dispense a liquid, typically a reagent in a chemical reaction, in small, accurately measured volumes. Its primary use is in analytical chemistry for titration.

Examples of Usage
  • Noun:
    • The chemist carefully filled the burette with the sodium hydroxide solution.
    • To determine the concentration of the acid, you need to read the meniscus on the burette.
    • The precision of a titration depends heavily on the accuracy of the burette.
Advanced Usage
  • "To read a burette": To accurately determine the volume of liquid in the tube by observing the bottom of the liquid's meniscus (the curved surface) at eye level with the graduation marks.
    • Always ensure you read the burette at eye level to avoid parallax error.
  • "Burette clamp": A specialized clamp, often attached to a stand, used to hold a burette securely in a vertical position.
    • Secure the burette in the burette clamp before beginning the titration.
Variants and Related Words
  • Buret (noun): An alternative, primarily American English, spelling of "burette".
  • Burette stand (noun phrase): A stand, usually made of metal, designed to hold one or more burettes.
  • Stopcock (noun): The valve at the bottom of a burette that controls the flow of liquid.
Synonyms
  • Measuring cylinder (though this typically lacks a stopcock and is for general measurement, not precise dispensing).
  • Pipette (another precision liquid handling tool, but it is designed to transfer a fixed or variable volume by suction, not by gravity flow from a tap).
Related Phrases / Contexts
  • "Titration apparatus": The collective equipment for a titration, which always includes a burette as a key component.
    • She set up the titration apparatus, checking that the burette was clean and the stopcock moved freely.
  • "Deliver from a burette": The act of letting liquid flow out of the burette in a controlled manner.
    • You should deliver the titrant from the burette slowly as you approach the endpoint.
burette

A scientist carefully adds a solution from a burette into a flask.

Noun
  1. measuring instrument consisting of a graduated glass tube with a tap at the bottom; used for titration

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