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In step 9 of the procedure, if you were asked to determine the mass of solution in a test tube, how  would you measure this mass?

In step 9 of the procedure, if you were asked to determine the mass of solution in a test tube, how  would you measure this mass?

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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In step 9 of the procedure, if you were asked to determine the mass of solution in a test tube, how 
would you measure this mass?

Your laboratory instructor will explain how to zero (tare) and properly use the analytical balance. If the balance does not appear to be operating correctly inform your instructor. 8. Weigh a Penny and record the mass using the analytical balance (8). Place the object on the center of the pan (remember the caution). Record each weight in grams and to the proper number of significant figures. 9. Repeat procedure above with a test tube (100 x 13 mm) (9)
Transcribed Image Text:Your laboratory instructor will explain how to zero (tare) and properly use the analytical balance. If the balance does not appear to be operating correctly inform your instructor. 8. Weigh a Penny and record the mass using the analytical balance (8). Place the object on the center of the pan (remember the caution). Record each weight in grams and to the proper number of significant figures. 9. Repeat procedure above with a test tube (100 x 13 mm) (9)
MASS: USING A LABORATORY BALANCE Mass measurements of objects are carried out with the laboratory balance. Many types of balances are available for the laboratory use. The proper choice of a balance depends upon what degree of precision you need for a measurement. In the SI system of units, the standard unit of mass is the kilogram (kg) and in the metric system the gram (g) is the unit used for mass measurements. Some conversion factors are listed below 1kg = 1000 g 1lb = 454 g 1 g= 1000 mg 1 oz. = 28.35 g Top loading analytical balances have high precision (Figure 5). Objects can be weighed very rapidly with these balances since the total weight, to the nearest 0.001 g, can be read directly off a digital read out. Balances of this type are expensive and care should be used when using the analytical balance (see caution below). Page 6 of 10 Experiment 1 Figure 5 A top-loading balance. Sample pan Power corel Droft pnilector Power switch Level indicator Integratiun time switclh Tan switch Mass indicator Levellng serew >CAUTION! In using any balance never drop an object onto the pan. Place it gently in the center of the pan. Never place chemicals directly on the pan: use either a glass container (watch glass. beaker. weighing bottle) or weighing paper. Never weigh hot objects: hot objects may mar the pan and buoyancy effects will cause incorrect weights. Clean up, any chemical spills in the balance area to prevent damage to the balance.
Transcribed Image Text:MASS: USING A LABORATORY BALANCE Mass measurements of objects are carried out with the laboratory balance. Many types of balances are available for the laboratory use. The proper choice of a balance depends upon what degree of precision you need for a measurement. In the SI system of units, the standard unit of mass is the kilogram (kg) and in the metric system the gram (g) is the unit used for mass measurements. Some conversion factors are listed below 1kg = 1000 g 1lb = 454 g 1 g= 1000 mg 1 oz. = 28.35 g Top loading analytical balances have high precision (Figure 5). Objects can be weighed very rapidly with these balances since the total weight, to the nearest 0.001 g, can be read directly off a digital read out. Balances of this type are expensive and care should be used when using the analytical balance (see caution below). Page 6 of 10 Experiment 1 Figure 5 A top-loading balance. Sample pan Power corel Droft pnilector Power switch Level indicator Integratiun time switclh Tan switch Mass indicator Levellng serew >CAUTION! In using any balance never drop an object onto the pan. Place it gently in the center of the pan. Never place chemicals directly on the pan: use either a glass container (watch glass. beaker. weighing bottle) or weighing paper. Never weigh hot objects: hot objects may mar the pan and buoyancy effects will cause incorrect weights. Clean up, any chemical spills in the balance area to prevent damage to the balance.
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