0
The crucible must be cold before weighing because the heat from the crucible will warms the surrounding air
Add your answer:
Earn +20 pts
What is the purpose of taring the crucible before using the incineration process?
It reduces errors caused by variations in the weight of the crucible itself.Taring is accurately establishing the empty weight of the crucible, which can vary with contaminants, residue, or oxides. By repeatedly heating, cooling, and weighing the crucible, until there is only an acceptable variation between weighings, the actual weight of samples before and after incineration can be more precisely measured.
Why need to cool The Crucible by Arthur Miller before measuring?
The crucible must be weighted at a constant temperature, generally 20 oC. During an analytical determination - for example - all the weighings must be made at the same temperature. Also a hot crucible has a negative influence on the balance.
Why is a desiccator used to cool a crucible?
A desiccator is used to cool a crucible in order to prevent the absorption of moisture during the cooling process so an accurate result can be obtained
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.
During the cooling of the fired crucible water condensed on The Crucible wall before its mass measurement Will the reported percent water in the hydrated salt be reported too high or too low?
The percent of water is determined by the loss is mass after heating the water vapor condensed on the crucible wall before heating.
Why is it required to cool down a crucible before weighting it?
Cooling down the crucible before weighing it helps prevent thermal expansion or contraction that could affect the accuracy of the measurement. Weighing a hot crucible could also cause the balance to give an incorrect reading due to the heat affecting the mechanics of the instrument. Cooling down the crucible ensures a more accurate and reliable measurement.
Why are crucible and tongs used to transfer The Crucible after heating and before weighing?
the crucible might be hot hence it is handy
What is the purpose of taring the crucible before using the incineration process?
It reduces errors caused by variations in the weight of the crucible itself.Taring is accurately establishing the empty weight of the crucible, which can vary with contaminants, residue, or oxides. By repeatedly heating, cooling, and weighing the crucible, until there is only an acceptable variation between weighings, the actual weight of samples before and after incineration can be more precisely measured.
Why you need to cool the sample first before you weigh it?
Cooling the sample before weighing it helps prevent any volatile components from evaporating, which could result in an inaccurate measurement. Additionally, cooling the sample ensures that it reaches thermal equilibrium with the surroundings, reducing errors caused by temperature differences during weighing.
Why need to cool The Crucible by Arthur Miller before measuring?
The crucible must be weighted at a constant temperature, generally 20 oC. During an analytical determination - for example - all the weighings must be made at the same temperature. Also a hot crucible has a negative influence on the balance.
Why is a desiccator used to cool a crucible?
A desiccator is used to cool a crucible in order to prevent the absorption of moisture during the cooling process so an accurate result can be obtained
What is the purpose of taring the crucible before using it in an incineration process?
Taring the crucible before using it in an incineration process helps to accurately measure the mass of the sample being incinerated by ensuring that only the sample's mass is recorded, not the mass of the crucible itself. This step helps to obtain precise results in the analysis of the sample's composition or content.
Why should you use tongs rather than fingers to handle your cooled cricible and lid?
Because fingerprints can add a considerable mass to the crucible when weighing it.
What is a crucible tong?
Crucible tongs are made up of aluminum that used for moving the crucibleswhen they are still hot to cool it down.
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 is it inadvisable to determine the mass of a hot crucible and lid?
Determining the mass of a hot crucible and lid is inadvisable because heating can cause volatile substances to escape or react, leading to an inaccurate measurement. Moreover, handling hot objects increases the risk of burns or accidents. It is recommended to allow the crucible to cool to room temperature before measuring its mass.
How would a synthesis reaction cause the mass of a product to be higher than the metal in a crucible?
Heating a metal in a crucible can cause the metal to react with the surrounding gases. thus, when weighing the metal after heating, the mass increases because of the addition of the gaseous elements
