Chemistry Titration Lab

Table 1: Data Collection Table – Contains all of the primary data directly obtained from the lab. Indicator | Initial volume of NaOH in burette (ml) ±0.05 | Final Volume of NaOH in burette (ml) ±0.05 | Final – initial Burette Reading (Volume of NaOH used) (ml) ±0.1 | Qualitative Observations | Phenolphthalein | 0.00 | 0.90 | 0.9 | At first when the base was being dropped into the vinegar there wasn’t a color change, however when the solutions came close to full titration, the solution would turn pink and once mixed would turn clear again | | 0.90 | 2.30 | 1.4 | | | 2.30 | 3.20 | 0.9 | | | 3.20 | 4.10 | 0.9 | | Bromothymol Blue | 8.00 | 9.50 | 1.5 | Solution turned from yellow to light green | | 9.50 | 11.10 | 1.6 | Solution turned from a bright yellow to bright blue rather than a light green indicating over-titration had occurred | | 11.10 | 12.90 | 1.8 | | | 12.90 | 14.40 | 1.5 | | | 14.40 | 15.90 | 1.5 | | Methyl Orange | 15.90 | 16.90 | 1.0 | Reaction occurred quick, over-titration occurred and solution turned from red to orange | | 16.90 | 17.20 | 0.3 | | | 17.20 | 17.40 | 0.2 | | | 17.40 | 17.60 | 0.2 | | | 17.60 | 17.80 | 0.2 | | Methyl Red | 0.00 | 5.00 | 5.0 | | | 5.00 | 7.80 | 2.8 | Solution turned from red to a light orange/yellow color | | 7.80 | 10.70 | 2.9 | | | 10.70 | 13.60 | 2.9 | | | 13.60 | 16.50 | 2.9 | | Bromocresol Green | 20.80 | 21.20 | 0.4 | Solution turned from yellow to light green | | 21.20 | 21.60 | 0.4 | | | 21.60 | 22.00 | 0.4 | |

Table 2: Data Processing Table displaying the volume of NaOH required to titrate 10ml of vinegar and their corresponding concentration of acetic acid Indicator | Volume of NaOH required to titrate 10mL of Vinegar (ml) (±0.1) | Concentration of Acetic Acid ±0.5 (mol/l) | Percent Uncertainty (%) | Percent Error (%) | Phenolphthalein | 0.9 | 0.9mol/dm3 | 11.1 | 3.4 | Bromothymol Blue | 1.5 | 1.5mol/dm3 |

Bibliography: Websites: "Chemical Analysis by Acid-Base Titration." AcidBaseTitration. N.p., n.d. Web. 12 Nov. 2012. <http://chem.lapeer.org/Chem2Docs/AcidBaseTitration.html>. "ChemTeacher." ChemTeacher. N.p., n.d. Web. 12 Nov. 2012. <http://chemteacher.chemeddl.org/services/chemteacher/index.php?option=com_content>. "Sample Lab Report." Sample Lab Report. N.p., n.d. Web. 12 Nov. 2012. <http://www.chem.purdue.edu/courses/chm115/Laboratory/Records___Reports/Sample_Lab_Report/sample_lab_report.html>. "Titration Lab Report." Titration Lab Report. N.p., n.d. Web. 12 Nov. 2012. <http://www.slideshare.net/AuburnFeather/cfakepathtitration-of-7>. Books: Textbook: Talbot, Chris. Chemistry for the IB Diploma. London: Hodder Murray, 2009. Print.