Lab 17 Acids and Bases

Lab 17 Acids and Bases - Date Performed Date Submitted...

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Date Performed: 03/17/08 Name: Dustin Rinehart Date Submitted: 03/24/08 Partner: Sarah Volski Instructor: Furong Sun Objective To learn how to use and standardize a pH meter To distinguish between solutions of acids and bases by measuring their pH values To examine the hydrolysis of salts To cause a dye to change color by changing the pH of its solution Experimental Data pH=7 buffer solution A) B) pH diluted w/ deionized tap 6.6 deionize d 8.02 HCl 1 2.02 HC2H3 O2 2.77 3.16 NaOH 12.5 5 11.65 NH3 11.3 7 10.8 diluted buffer solution pH NaC2H3O 2 8.33 NH4Cl 6.95
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NaHCO3 7.27 none 7.63 100ml dionized water solution pH 10 drops HCl 2.5 titrated w/ NaOH 10.32 C) Sample Calculations ) Part A a pH= pH after dilution - pH before solution pH= 2.02-1.00= 1.01 Results Part A) pH pH (diluted) pH descriptio n HCl 1 2.02 1.01 strong acid HC2H3 O2 2.77 3.16 0.39 weak acid NaOH 12.55 11.65 -0.9 strong base NH3 11.37 10.9 -0.47 weak base
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Part B) pH hydrolysis (y/n)
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This note was uploaded on 04/06/2008 for the course CHEM 1045 taught by Professor Pgamateis during the Spring '08 term at Virginia Tech.

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Lab 17 Acids and Bases - Date Performed Date Submitted...

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