Question

quick and easy to answer!
1. suppose you are working in a busy lab with multiple people sharing a given analytical balance. if you are weighing something which you will only have to weigh once, such as weighing out a reagent onto some weigh paper, which you immediately use to make a solution. is it OK to use the balance ' tare or zero function to set the vessel tare to zero? why or why not? if not what should be done instead?
2. now suppose you are weighing something thay you will have to weigh again later. for example suppose you are weighing out some sample into a crucible. later in the procedure you will heat the sample in the crucible to partially decompose it and you will need to know the mass of the material thay remains. is it OK to use the balance's zero fun tin to set the tare to zero? why or why not. if not what should you do instead.

Answer 1

1. Yes, it is OK to use the balance ' tare or zero function to set the vessel tare to zero. It is because tare weight is accounted for analytical (scientific) weighing scales and other scales which include a button that resets the zero of the scale display when an empty container is placed on the weighing platform, in order to subsequently display only the weight of the contents of the container.

When you tare a scale you get it back exactly to zero. Sometimes after weighing things it will have .02 or another amount that will alter future weighings. So to be exact, before each measurement it is tore. Once tared, the sample may be placed directly into the beaker.

2. Yes, it is OK to use the balance's zero fun tin to set the tare to zero. It is because when you weigh something on it, you want the reading to be accurate. If the scale reads 1 lb., for example, when there is nothing on it, then it obviously needs to be zeroed. Otherwise, what you weigh will be that much off in the final reading. This function then becomes convenient if you have to weigh something with something else (such as liquid in a container). Zeroing does the subtraction for you.