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Answer :
It is advisable to use tongs or a test tube holder when taking a beaker off a laboratory burner to prevent burns and ensure safety.
The primary reasons for this are:
1. Heat Insulation: Beakers can become extremely hot during experiments, especially when placed on a burner. Tongs and test tube holders are designed to provide insulation against this heat, protecting the user's hands from burns.
2. Stability and Control: Tongs and holders offer a secure grip on the beaker, reducing the risk of dropping it, which could lead to breakage, spillage of hot contents, and potential injury.
3. Protection from Chemical Spills: In case the beaker contains hazardous chemicals, using tongs or a holder minimizes the risk of skin contact with these substances.
4. Avoiding Contamination: Using a dedicated tool like tongs or a holder prevents the transfer of oils, sweat, or other contaminants from the hands to the beaker, which is crucial for maintaining the integrity of the experiment.
5. Ergonomics: These tools are often designed to be ergonomic, allowing for a more comfortable grip and reducing strain on the hands and wrists, especially during prolonged laboratory work.
6. Safety Protocols: Laboratory safety protocols typically require the use of appropriate personal protective equipment (PPE) and tools to handle hot or hazardous materials, and tongs or test tube holders fall under this category.
In summary, the use of tongs or a test tube holder is a standard safety practice in the laboratory that helps prevent accidents and injuries, ensures the purity of experiments, and adheres to established safety guidelines."
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Answer: The beaker may have heated up greatly over the process of being on the burner, and if you take it off the burner with, say, your bare hands, you run the risk of taking your hands off of it because its hot, and then drop the beaker, most likely shattering it
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