# _ CHM 113_ Glassware.pdf - Introduction: Accuracy is how...

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Introduction:Accuracy is how close the observed value is to the real standard value, whileprecision is how close multiple measurements are to each other.It is possible to beaccurate but not precise, precise but not accurate, or both accurate and precise.Whenperforming measurements in an experiments, it is crucial to utilize correct significantfigures, which controls how accurate or how inaccurate certain measurements aremade.Dilution is the action that reduces the concentration of a sample.The mostcommon way to dilute a liquid sample is to add water.Density is an intensive propertyof substances/objects which measures how tightly compacted the matter is in thespecific substance/object.The formula of Density is typically: Density = Mass/Volume,because density measures how much matter —which is mass— that a certainsubstance/object has in comparison to its volume.The central objective of thisexperiment is to determine the most accurate and precise glassware when measuringcertain samples.Procedures:Part I:First, acquire the following materials: Beaker (50 mL and 600 mL), VolumetricFlask, Burette, Graduated Pipet, Pipette safety bulbs, Water, Scale/balance, andThermometer.Then find the temperature of the water using the thermometer.Next,using the temperature, research the density of water at the observed temperature.Thenfind the mass of each container using the scale and fill each container with water
to approximately 10 mL.Next, find the mass of each container with the water.Following that, Subtract the initial mass of each container from the mass of eachcontainer with water.Then, find the percent error using by subtracting the experimentalvalue from the accepted value, then divide it by the accepted value.Next, compare thepercent error of each container to find the greatest accuracy and then repeat steps 1-9.

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Term
Fall
Professor
Anbar
Tags
Accuracy and precision, Laboratory glassware
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