Section E part 1 Titration Curve Create a titration curve using the data from the video and attach the titration curve. This can either be done electronically and inserted into the space below or created by hand and included as the next page of your report. Well # 1 2 3 4 5 6 7 8 9 10 11 12 pH 2 2 2 3 8 10 11 11 11 11 11 11 Figure 14.1 –Titration Curve Question 8: What is the net ionic equation for the reaction between HCl and NaOH? NaOH + HCl →H2O + NaCl Question 9: Consider a titration in which 0.03 M NaOH is added to 1 drop of 0.12 M HCl. Sketch the pH curve. A sketch is a rough picture of the general shape of the curve with the requested points and axes correctly labeled. On your curve, show: (a) The volume of 0.03 M NaOH needed to reach the equivalence point. (b) The pH at the equivalence point.
Penn State CHEM 113 (c) The pH at the beginning of the titration before any 0.03 M NaOH has been added to the 0.12 M HCl. (d) The pH when you are well past the equivalence point. Figure 14.2 –pH Titration Curve for NaOH and HCl Question 10: Considering your data for methyl orange, bromocresol green, bromothymol blue, and phenolphthalein (Figure 14.3), which indicator would be the most suitable for a titration between HNO3with KOH solution? Explain your selection. Bromothymol blue would be the best suited indicator for a titration between HNO3and KOH because it is the only indicator with a pH transition range including pH = 7. The transition range is 8 +/- 1. It is also the most suited because pH = 7 is the normal equivalence point for a strong acid with strong base titration. Section E. Part 2. Titration of a Weak Acid with a Strong Base Data and Observations:1 –yellow 2 –yellow 3 –yellow 4 –light green 5 –green 6 –purple
Penn State CHEM 113 7 –purple 8 –purple 9 –purple 10 –purple 11 –dark purple 12 –dark purple Section E part 2 Titration Curve Create a titration curve using the data from the video and attach the titration curve. This can either be done electronically and inserted into the space below or created by hand and included as the next page of your report. Figure 14.3 –Titration Curve Section E. Part 3. The Measurement of the Kaof a Weak Acid from the Titration Curve Data and Observations:Find the Kafor acetic acid Ka= 4.9 Your name: Serafina Mazza Date completed: March 18, 2021