When you’re doing lab work, it’s crucial to get the right amount of sodium chloride. You need 120 grams for many experiments. If you don’t measure correctly, your results might be off and hard to repeat.
To get an accurate measurement, use a special balance that’s precise and calibrated just right. Make sure there are no distractions like static electricity or air movement that could throw off the reading. Getting it right is key because it helps you trust the data and make solid conclusions.
Step-by-Step Procedure for Massing out 120 g of Sodium Chloride
Necessary Equipment:
Analytical balance
Weighing boat or container
Spatula
Sodium chloride (NaCl)
Laboratory gloves (optional)
Calibration of the Balance:
Ensure the analytical balance is on a stable, vibration-free surface.
Turn on the balance and allow it to warm up if required by the manufacturer’s instructions.
Ensure the balance pan is clean and free of any debris.
Use a calibrated standard weight to check the accuracy of the balance.
Place the standard weight on the balance pan, and note the displayed weight.
Adjust the balance according to the manufacturer’s instructions if the displayed weight does not match the standard weight.
Repeat the calibration process until the balance displays the correct weight.
Exact Measurement Procedure:
Turn on the analytical balance and wait until it stabilizes.
Place the weighing boat or container on the balance pan.
Tare (zero) the balance to exclude the weight of the weighing boat or container.
Open the container of sodium chloride and use the spatula to transfer the compound into the weighing boat or container.
Carefully add sodium chloride until the balance displays approximately 120 g.
If the weight exceeds 120 g, remove the excess using the spatula and adjust until the balance shows exactly 120 g.
Ensure the balance reading is stable before removing the weighing boat or container.
Transfer the weighed sodium chloride to the desired location or use it immediately for your experiment.
By following these steps, you will ensure an accurate and precise measurement of 120 g of sodium chloride.
To accurately measure 120 grams of sodium chloride, it’s essential to use an analytical balance that is calibrated and placed on a stable surface.
Before starting, ensure the balance is free from distractions such as static electricity or air movement. Calibration of the balance involves using a standard weight to check its accuracy and adjusting it according to the manufacturer’s instructions.
When measuring, turn on the balance and wait for it to stabilize before placing the weighing boat or container on the pan. Tare (zero) the balance to exclude the weight of the boat or container.
Carefully add sodium chloride until the balance displays approximately 120 g, then adjust as needed to reach the exact measurement.
Common pitfalls to avoid include not calibrating the balance properly, using a contaminated weighing boat or container, and introducing distractions that can affect the reading.
To ensure accuracy, it’s also crucial to handle the sodium chloride carefully to prevent spills or contamination. By following these best practices, you’ll be able to achieve an accurate and precise measurement of 120 g of sodium chloride.