why Covering the crucible with its lid as soon as the magnesium starts burning
Oil from the fingers can contamine the surface of the crucible and lid
it is critical to set the lid just off the lip of the crucible to allow the evolved water molecules to escape on heating.
So you dont burn your self
you should :)
why Covering the crucible with its lid as soon as the magnesium starts burning
Oil from the fingers can contamine the surface of the crucible and lid
A crucible is a container used for heating substances to high temperatures in laboratory settings. A lid is a cover that can be placed on top of the crucible to prevent the escape of substances during heating and to protect the contents from contamination. Together, they are used for controlled heating and chemical reactions in experiments.
it is critical to set the lid just off the lip of the crucible to allow the evolved water molecules to escape on heating.
So you dont burn your self
If not the substances or chemical in the crucible will flow out and drip onto the table
A crucible is a container that is able to withstand very high temperatures. The most common function of a crucible is to hold metal that is melted and formed into new materials.
a crucible with the lid slightly ajar :-)
you should :)
Tongs should be used to handle a cooled crucible and lid to prevent burns or injury from residual heat. Fingers are not insulated against heat like tongs are, and using them to handle a hot crucible can result in burns. Tongs provide a safe and secure grip on the crucible and allow for better control when moving it.
To hold your crucible remotely, This is useful when you want to burn the contents of your crucible without getting burned.
Putting aside the crucible lid at the beginning and during the heating process allows for any moisture or impurities to evaporate from the sample. It also prevents pressure buildup inside the crucible, which could cause the lid to pop off and disrupt the experiment. Additionally, it helps to ensure proper ventilation during the heating process.