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Top Loading Balance Lab Report

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Lab Report: Using a Top Loading Balance

  1. How is the balance turned on?

  * The top loading balance is turned on by pressing down on the bar, located on the lower front of the balance. Weighing should be postponed untill the scale zeros out, showing “g” for grams, to the far right of the display screen on the balance.

  2. Write a complete and accurate procedure for weighing a chemical on the top loading balance.

  * Turn on the top loading balance by pressing down on the bar, located on the lower front of the balance.
  * Wait untill the scale zeros out, showing “g” for grams to the far right of the display screen on the balance.
  * Place a weighing paper on the balance. Press down on the bar again, waiting untill the scale zeros out, showing “g” for grams to the far right of the display screen on the balance.
  * Place the specified amount of chemical on the weighing paper, on top of the pan.
  * Record the number on the scale; this is the weight of the chemical in grams.

  3. Identify two things that can go wrong when using the procedure in item 2 above.

  * One thing that can go wrong using the procedure in item 2 above, is that the student could forget to zero the scale, after placing the paper on top of the balance.

  * Another thing that could go wrong using the procedure in item 2 above, is that the student could forget to place the weighing paper, applying the chemical directly to the scale.

  4. What is the role of the weighing paper in this procedure? What potential risks might be present if the weighing paper is not used?

  * The role of the weighing paper in this procedure is to provide a barrier between the chemical and the scale. Potential risks that may be present in the absence of the weighing paper include inaccurate weighing, and chemical reactions between the chemical and the balance metal.

  5. What is the mass of the chemical in grams in the above procedure?

  * The mass of the chemical...

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