Procedure Text for SMK : How to Operate Digital Balance for Chemical Material

 

Goal

To operate a digital balance for weighing chemical material correctly and safely.

Materials

• A digital balance
• Chemical material
• Weighing paper, container, or beaker
• Spatula

Steps

1. First, place the digital balance on a flat and stable surface.
2. Make sure the balance is clean and ready to use.
3. Turn on the digital balance by pressing the power button.
4. Wait for a few seconds until the screen shows zero.
5. Put the weighing paper or container on the balance.
6. Press the tare button to reset the display to zero.
7. Take the chemical material with a spatula carefully.
8. Then, place the chemical material little by little into the container.
9. Watch the screen and stop when the required mass is reached.
10. After that, remove the container carefully from the balance.
11. Turn off the digital balance after using it.
12. Finally, clean the balance area to keep it safe and accurate.

Conclusion

Operating a digital balance is easy if you follow the steps correctly. You must be careful and accurate when weighing chemical materials to get the correct result and keep the laboratory safe.

1. What is the purpose of the text?
A. To describe a digital balance
B. To explain how to operate a digital balance for chemical material
C. To tell a story about laboratory tools
D. To compare digital and manual balance

2. Where should we place the digital balance?
A. On a flat and stable surface
B. On a wet table
C. On a soft bag
D. On an uneven surface

3. Which button is used to reset the display to zero?
A. Start
B. Power
C. Print
D. Tare

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4. Why do we press the tare button before adding the chemical material?

A. To make the screen brighter
B. To count the weight of the container only
C. To reset the weight of the container to zero
D. To turn off the balance automatically

5. What should we use to take the chemical material carefully?
A. Spoon
B. Spatula
C. Fork
D. Knife

6. What should you do after turning on the digital balance?
A. Put the chemical directly on it
B. Wait until the screen shows zero
C. Press the tare button many times
D. Clean the room first

7. Why should the chemical material be added little by little?
A. To make the process longer
B. To avoid reaching the required mass too quickly
C. To make the material look better
D. To reduce the size of the container

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8. Rina puts a beaker on the balance, but she forgets to press the tare button. Then she adds the chemical material until the display shows 25 grams. What is the most possible result?

A. The chemical material is weighed accurately
B. The weight shown is only the chemical material
C. The measured weight includes the beaker and may be inaccurate
D. The balance will turn off automatically

9. Look at these steps:

1. Add the chemical material slowly
2. Press the tare button
3. Put the container on the balance
4. Turn on the balance
5. Read the weight on the display

Which is the correct order?
A. 4 – 3 – 2 – 1 – 5
B. 3 – 4 – 2 – 1 – 5
C. 4 – 2 – 3 – 1 – 5
D. 2 – 4 – 3 – 5 – 1

10. After using the digital balance, students leave chemical powder on it. What is the best conclusion about this action?
A. It is fine because the balance can clean itself
B. It is dangerous because it can affect safety and measurement accuracy
C. It is good because the powder can be used again
D. It does not matter if the balance is turned off