![]() ![]() The volumetric flask is the most accurate, but it only measures 1 volume-in this case, 100mL. For example, which pieces should be used for measurement, and which should not be used for measurement? The second method was more precise because volume was calculated using density, the temperature of water, and a digital balance.īased on accuracy, assign each piece of glassware appropriate uses and state evidence for your choice. The first method provided a less precise ranking of glassware since the volume of water had to be estimated for every piece of glassware but the volumetric flask. How do the 2 methods of determining accuracy compare? Were the results the same or different? The flask had the highest percent error (17.4%), so it is the least accurate. Both were small, so they are fairly accurate. The graduated cylinder and beaker were similar in percent error (2.2% and 3.5% respectively). The volumetric flask had the lowest percent error (0.3%), so it is the most accurate. Volumetric flask, graduated cylinder, beaker, flask GlasswareĬalculate the percent error for each piece of glassware and record the values.īased on percent error only, rank the glassware from most accurate to least accurate. (Handbook of Chemistry and Physics, 53rd Edition)Īverage the individual actual volumes for each piece of glassware and place the values in the table. ![]() Using individual data and the density of water table, calculate the actual volume of water in each piece of glassware.ĭensity = mass/volume Density of Water by Temperature Student answers will vary, but they should notice higher accuracy for the volumetric flask and graduated cylinder. ![]() Based on the data collected, rank the 4 pieces of glassware from most accurate to least accurate. ![]()
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