You typically use a balance to determine the mass of an object directly; you don't necessarily need to use anything "with" it other than the object you want to weigh. The balance itself provides the measurement. However, depending on the object, you might need accessories.
Here's a breakdown:
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The Object Itself: The primary "thing" you use with a balance is the object whose mass you want to measure.
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Taring Container (Optional):
- Purpose: If you're weighing a substance that needs to be contained (e.g., a powder, liquid, or small objects), you'll use a container like a beaker, flask, weighing boat, or weighing paper.
- Process: The container's mass is first tared (zeroed out) on the balance. This means the balance is set to read zero with the empty container on it. Then, you add the substance to the container, and the balance will display only the mass of the substance itself. This eliminates the container's mass from the final reading. The reference mentions "taring" as one method to measure mass, and it is essential when using a container.
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Handling Tools (Optional):
- Purpose: To safely and accurately transfer the substance without contaminating it or affecting the balance.
- Examples: Spatulas for powders, pipettes for liquids, and forceps or gloves for solid objects.
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Calibration Weights (Periodically):
- Purpose: To ensure the balance is accurate.
- Process: Calibration weights of known mass are placed on the balance. If the balance reading matches the known mass of the weight (within the balance's specified tolerance), it is properly calibrated. If not, the balance needs calibration.
In summary, while a balance provides a direct mass reading, using containers and tools ensures accurate and safe measurements, especially for substances that can't be placed directly on the balance pan. Remember that taring is a critical function for accurate measurements when using a container.
