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Using the Laboratory Balance |
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When measuring the mass of an object, one must strive to get the most precise measurement. This can be successfully accomplished by using a balance. A beam balance will be used to mass certain utensils and compounds. Beam balances are the most standard, used in laboratory experiments to mass objects. Two types of beam balances, which may be used to complete this experiment, are the triple beam platform balance and the four-beam pan balance.
Here are the steps for using a balance properly: 1. Adjust all riders, so that each reads zero. Then check to make sure that the pointer, or beam, swings to "zero" on the center mark. If the pointer does not read correctly, then use the "adjustment screw" to obtain the zero reading. 2. Warning: do not place any chemicals onto the balance pan or platform. All chemicals, solutions, or compounds should be placed into a beaker or other container first. 3. After you place the sample onto the pan or platform, move the largest rider across the beam until the pointer drops. Then move this rider back once. Follow this same procedure for the rest of the smaller riders, until the pointer swings to the zero mark. 4. To record the mass, add the masses shown by each rider. (Note: masses are in grams) Please forward all questions, comments and criticisms to Gregory L. Curran.
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