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Why should you never place chemicals directly on balance pans?
Do not place chemicals directly on the balance pan unless they are inert (unreactive) and at room temperature. The reason for this rule is that many chemicals react with the balance pan. Some attract moisture and cause corrosion. Any residue that sticks to the pan can interfere with weighing.
Why does it matter if the balance is cleaned before use?
It’s important to keep laboratory balances clean, especially the more precise analytical balances, because spills can react with the surfaces of these sensitive instruments, which can affect the accuracy of their measurements, according to “Analytical Chemistry for Technicians.” Spilled chemicals or debris can also …
Why may it be important to weigh the container before adding liquid?
Weighing a liquid, powder, or granular substance The readout will read zero with the container sitting on the pan. This allows the mass of your sample to be read directly. Add the substance to be weighed. Be careful not to spill chemicals on the balance.
Why is analytical balance more accurate?
Analytical balances have finer readability, are much more sensitive to changes, and can detect smaller variations in mass. Precision balances have more variety in body style and options, but they do not offer readabilities greater than three decimal places.
What is one advantage of using an analytical balance instead of a top loader balance?
Conclusion, for extream accuracy an analytical balance is a better choice for your laboratory. An analytical balance will measure the accuracy of 0.0001 to 0.00001g. If extream accuracy is not important a top-loading balance will work just fine in measuring the accuracy of 0.001g.
Why is it extremely important to keep an analytical balance clean?
It is extremely important to clean the analytical balance as debris inside the weighing chamber can affect the weighing results. When you keep the external components clean, you make sure that no dust finds its way inside the balance.
What are the importance of the balance doors on the analytical balance?
RULES FOR ANALYTICAL BALANCES Close the balance door, while weighing an object, in order to prevent air currents from disturbing the reading. When finished, the operator should close the balance door to prevent dust and dirt from entering the balance.
What is the advantage of using an analytical balance?