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The empty crucible is heated AND WEIGHED, so that you can drive off any moisture and/or other particles that might add to the weight of the empty crucible. You will eventually weigh the crucible again at the end of the experiment to determine the weight (mass) of some compound. Thus, it is important to have a correct "starting mass" of the crucible.
Wiki User
∙ 7y ago
Wiki User
∙ 7y agoThe scope is to eliminate any impurities from the crucible, up to constant weight..
Wiki User
∙ 6y agoThe purpose is to delete any contaminant and to obtain a constant weight.
Wiki User
∙ 11y agomeasure the crucible without water
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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 will happen if a crucible containing a sample is heated with a very hot flame causing the sample to splatter out in a chemistry experiment?
The experimenter could get burned by the hot or caustic sample.
How long from the from the start of the experiment was the substance heated before all of the substance turned into a liquid?
It is impossible to tell how long from the start of the experiment it was before all of the substance turned into a liquid without more information about the experiment. Perform the experiment again and use a timer to determine the length of time required to turn the substance into a liquid through heating.
Analysis test for magnesium oxide?
Magnesium is weighed and then heated in a crucible. It reacts with oxygen to produce the oxide. It can be shown that there has been an increase in mass.
Why are the empty crucible and cover fired to red heat?
To drive off any volatile materials that might alter the mass of crucible and cover.
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 will happen if a crucible containing a sample is heated with a very hot flame causing the sample to splatter out in a chemistry experiment?
The experimenter could get burned by the hot or caustic sample.
What is the use of crucible?
A crucible is used to contain chemical compounds when heated to extremely high temperatures.
What are the uses of clay triangle?
Clay triangle is used to hold a crucible while the crucible is heated.
Why evaporation is faster from a heated crucible?
because it is faster
What combined wih the magnesium when it was ignited in The Crucible?
oxygen. O2 was combined with magnesium when it ws heated in the 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.
When cuso45h2o is heated in a crucible there is a loss of water how is the amount of water loss determined?
Weigh mass before heating and weigh mass after heating. Before mass - after mass.
Uses of triangular clay in science lab?
The clay triangle is used to hold a crucible while the crucible is heated.
How do you know when a heated crucible has returned to room temperature?
holding your hand about 1 cm above the crucible to test is still hot..Caleb!
Why is it important to add water to a heated crucible when obtaining the mass of MgO?
Pure MgO will absorbe water from the air causing an error in the experiment if that extra mass is not accounted for. By adding water in the very beginning you eliminate this error.
What element combines with Magnesium when heated in a crucible?
oxygen...it forms magnesium oxide
