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If you are using the crucible for any type of gravimetric analysis (observing changes in mass upon the heating of a compound), then before you add your sample you need to bake the crucible in order to drive off any adsorbed materials---namely water. If you do not do this, then the initial mass of your compound will be artificially high, and so when all that adsorbed stuff is baked off, your change in mass will be high.
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∙ 7y ago
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∙ 13y agoTo acquire the DRY weight, most objects have water on them, heating it evaporates it and gives you a more accurate measurement of weight.
Wiki User
∙ 10y agoTo be sure that the weight is correct and to calculate the mean weight.
Wiki User
∙ 10y agoBecause it must be heated
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What glasswear do you use to heat a solid?
a crucible and cover
What items is used to distribute heat from a Bunsen burner when heating the bottom of a crucible?
A crucible is placed in a pipestem triangle placed on an iron ring while being heated. This supports the crucible while allowing the bottom of the crucible to be directly exposed to the flame of the Bunsen burner. There is no item that is used to distribute heat from a Bunsen burner when heating the bottom of a crucible. The bottom of the crucible is intended to be exposed to the direct flame of the Bunsen burner.
What is a crubicle?
A crucible is a container that is usually made out of metal or ceramic. It is used to heat substances to very high temperatures.
What is the mass of empty crucible and cover?
Well you see that the heat causes the crucible to blow up, almost causing an explosion. This then causes the MgNO4 gas to heat to it's 1.023 degree compound of 2 to the -2 power. The air inside of the metal makes the gas for the crucible go down and the mass changes in a way that is similar to a dog when he eats very hot grass on a very warm summer day (150 degree gas; 100 degree day). Hope this helps, Gilbert
What is using a calorimeter?
Heat is measured using calorimeter.A calorimeter is an object used for calorimetry, or the process of measuring the heat of chemical reactions or physical changes as well as heat capacity.
Why cool the crucible before weighing?
The crucible must be cold before weighing because the heat from the crucible will warms the surrounding air
A porcelain container used to heat things up in?
It is called a Crucible
What glasswear do you use to heat a solid?
a crucible and cover
Why must the crucible be cooled before weighing?
There are a few reasons: Safety, so individual does not get burned; a hot crucible could damage the scale; hot crucible could alter the substance being weighed; a hot crucible as the heat is released into surrounding air, it causes convection air currents when using an electronic scale than measures to multiple decimal places can give a miss reading and give the individual a larger error percentage in their experiment.
Why should you heat an uncovered crucible in a chemistry lab experiment?
A crucible is a heat-resistant container in which materials can be heated to very high temperatures. If you heat with the cover on, it could produce an overflow of the material.
What is the right way to clean retainers?
I clean my retainer with my toothbrush and Listerine. There are tablets you can buy that you put in water and they dissolve and clean the retainers. Just whatever you do, DO NOT use any kind of heat to clean them! Using heat can misshapen your retainers!
What items is used to distribute heat from a Bunsen burner when heating the bottom of a crucible?
A crucible is placed in a pipestem triangle placed on an iron ring while being heated. This supports the crucible while allowing the bottom of the crucible to be directly exposed to the flame of the Bunsen burner. There is no item that is used to distribute heat from a Bunsen burner when heating the bottom of a crucible. The bottom of the crucible is intended to be exposed to the direct flame of the Bunsen burner.
What is a good sentence for crucible?
The crucible of life's challenges often reveals one's true character and resilience.
Why the empty crucible and cover fired to red heat?
To drive off any volatile materials that might alter the mass of crucible and cover.
A ceramic container with lid which is used to heat chemicals to high temperature?
Crucible
Why is it necessary to cover The Crucible by Arthur Miller when it is being heated?
It is necessary to cover the crucible when it is being heated for two basic reasons: primarily, it maintains a higher temperature inside the crucible. Without the lid, the heat simply escapes. Secondly, it keeps the material inside the crucible from splashing out.
What should be used to heat a solid in the presence of air?
a crucible with the lid slightly ajar :-)
