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- 40.00 mL of 0.0900 M NaOH is diluted to 100mL and titrated with 0.1000M HCI. Calculate the pH after the addition of the following volumes of titrant (mL); (g) 36.05 ; (h) 40.00.3. 40.00 mL of 0.0900 M NaOH is diluted to 100mL and titrated with 0.1000M HCI. Calculate the pH after the addition of the following volumes of titrant (mL); (a) 0.00; (b) 10.00 ; (c) 18.00: (d) 30.00 ; (e) 35.95 ; (f) 36.00 (g) 36.05 ; (h) 40.00.3. Complete neutralization of 10 ml of phosphoric acid solution by NaOH 0.I N in the presence of phenol phthalein until the appearance of purple color (pH, = 9) 11 ml. of NaOH is consumed. (a) What is the concentration of phosphoric acid? (b) Calculate the indicator error. pk2.1 pK. - 7.2 pK - 124
- (6) 0.8203 g NaAc (FW=82.03 g/mol) was fully dissolved into 100.00 mL of 0.050 M HAc solution. Calculate th pH of the soolution.What other factors do you need to consider when assessing feasibility of titration?40.00 mL of 0.0900 M NaOH is diluted to 100mL and titrated with 0.1000M HCI. Calculate the pH after the addition of the following volumes of titrant (mL); (d) 30.00 ; (e) 35.95 ; (f) 36.00 (g) 36.05 ; (h) 40.00.
- 17) Determine the pH of a carbonate buffer system that contains 0.0065 M of HCO3- and 0.0084 M of CO32-. The Ka of HCO3- is 4.7x10-11.Be sure to answer all parts. Find the pH during the titration of 20.00 mL of 0.1000 M triethylamine, (CH3CH,);N (K, = 5.2 x 10-4), with 0.1000 M HCl solution after the following additions of titrant. (a) 13.00 mL: pH = 10.305 (b) 20.10 mL: pH = (c) 29.00 mL: pH = %3!2. List (e.g. 1, 2,...) the following buffer solutions in expected order of increasing buffer capacity. The values are presented as [A ]/[HA]. (1) 0.50 M / 0.50 M (2) 0.25 M / 0.35 M (3) 4.95 M/ 5.00 M (4) 0.25 M/0.10 M lowest highest
- What is the pH of the solution of 20mL IM H,PO, (pKa values = 2.16, 7.21, and 12.32) at the given points in the titration with a 1 M NaOH solution. (a) Initially (b) After 10 mL of NaOH. (c) After 20 mL of NaOH (d) After 35 mL of NaOH (e) After 50 mL of NaOH (f) After 70 mL of NaOHWhich type of indicator is used in permanganatometry titrant plays role of indicator by itself; irreversible Red/Ox indicator; reversible Red/Ox indicator; metallochrome indicator;Why is a lower concentration of NaOH or HCl used for titration while a solution with higher concentration is used for adjusting the pH of the remaining medium? [Answer in not more than 3 sentences]