EXPERIMENT 1 - EXPERIMENT 2: Two Challenges using...

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EXPERIMENT 2: Two Challenges using Conservation of Matter,  Stoichiometry and the Mole Josué J. Negron “I commit to uphold the ideals of honor and integrity by refusing to betray the trust  bestowed upon me as a member of the Georgia Tech community.” Signature:  Josué Negron 17:28:13  Lab Partner: Ahmed  Chemistry 1310- H1
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DISCUSSION QUESTIONS A. Balance: When is a Gram, a Gram?  1. What can be concluded about the precision and accuracy of the  manufacturer’s ability to put 1.0 g into each packet? What if the manufacturer  had stated that each packet contained 1.000 g?  The manufacturer’s ability to precisely measure 1.0 g into each packet was very  precise with only a ±0.01 difference between all five packets of sweetener. The  precision of the manufacturer’s ability deviated 0.03626 from the five packets. The  experimental mass of the contents was on average +0.1 higher than the  manufacturer’s nominal value. The percent errors of the experimental masses were  less than 17 percent, with an average of about 10 percent of error. The  manufacturer’s precision was superior to the accuracy. If the manufacturer stated  that each packet contained 1.000 g, then this statement is false. The experimental  data collected proves this statement to be false, since the observed masses of the  contents were +0.1 g higher than the nominal value.  2. What can be concluded about inter-balance precision? Why should only one  balance be used throughout an experiment?  The precision of the inter-balance readings were more precise than when several  balances were used. The standard deviation of only using one balance was 0.0007  while using various balances results in a deviation of about 0.036. The same balance  should be used throughout an experiment to avoid false data. The data is more  precise with the use of a single calibrated balance.  B. Measuring Liquids  1. Compare the precision of water that you were able to achieve with the three  types of glassware used to deliver 10mL aliquots of water to the stated 
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This note was uploaded on 04/12/2010 for the course CS 1371 taught by Professor Stallworth during the Spring '08 term at Georgia Institute of Technology.

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EXPERIMENT 1 - EXPERIMENT 2: Two Challenges using...

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