A burette and a pipette are both laboratory instruments used for precise measurement and delivery of liquids, but they serve different purposes and have distinct features:
Burette:
- Used to deliver a chemical solution with a known concentration into a flask.
- Designed to deliver a variable amount of liquid that can be quantified.
- Has a tap at the bottom and a stopcock at the bottom to control the flow of liquid.
- Typically used for titration, where the volume of liquid required is not known in advance.
- Requires a stand to be used properly.
Pipette:
- Used to measure the quantity of an analyte, the chemical substrate whose concentration is to be determined.
- Used to accurately and precisely transfer volumes of liquid in the microliter range.
- Has a bulge in the middle and a dropper-like system to release the liquid.
- More accurate in releasing liquid in smaller quantities than burettes.
- Often used in serial dilutions or transferring a set amount of liquid.
In summary, burettes are used for delivering a known concentration of a chemical solution and are often used in titration, while pipettes are used for accurately measuring and transferring small volumes of liquid.
Comparative Table: Burette vs Pipette
A burette and a pipette are both laboratory instruments used for precise measurement of liquids, but they serve different purposes and have distinct features. Here is a table highlighting the differences between the two:
| Feature | Burette | Pipette |
|---|---|---|
| Purpose | Used in titration processes for quantitative analysis | Used to accurately and precisely transfer volumes of liquid in the microliter range |
| Capacity | Larger, with a higher capacity of liquid to dispense | Smaller, with a lower capacity of liquid to dispense |
| Accuracy | Less accurate in releasing small volumes compared to pipettes | More accurate in releasing small volumes |
| Measurement | Can measure any volume of the solution | Can only measure predefined volumes of solution |
| Application | Commonly used in titration experiments | Used in various laboratory procedures |
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