please use the Information from \"Data Boxes\" post on page 1 and 2. Please answ
ID: 510654 • Letter: P
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please use the Information from "Data Boxes" post on page 1 and 2.
Please answer 1-3 and explain step by step,given the data. I'm so confused. Answer
102 Exercise 7 Report Form: Acids and Bases -Titration curves (Part Your report form for this experiment will include 3 attached Excel spreadsheets (each one on a Separate 8 eet of Each spreadsheet MUSTINCLUDE the titration data (ii) the titration curve graph and (ii) a box data (3 points) For acetic acid: (i) The titration curve data in two columns (ii) The graph of pH versus volume of titrant. (iii) In the data box include the value of pKa as determined from the pH halfway to the equivalence point and the m of the acetic acid using 0.075 M NaoH for the titrant and the volume of titrant used at the observed equivalence point. An example is given below (note the values are examples only): Data Box Equivalence point (mL titrant) 12.50 Half equivalence point (mL titrant 6.25 Half equivalence point pH 4.34 Ka 4.34 Original molarity of acetic acid (mol/L) 0.094 (3 points) For phosphoric acid: (i) The titration curve data in two columns (ii) The graph of pH versus volume of titrant. iii) In the data box include the values of pKal and pKaz as determined from the pH halfway to the relevant equivalence points, and the molarity of the phosphoric acid using 0.075 M NaoH for the titrant and the volume of titrant used at the observed equivalence points. An example is given below (note the values are examples only): Data Box Equivalence point 1 (mL titrant 10.00 20.00 Equivalence point 2 (mL titrant Half equivalence point 1 pH 4.89 Half equivalence point 2 pH 8.90 4.89 Ka1 8.90 Ka2 Molarity of phosphoric acid (mouL) 0.082 (3 points) For the unknown acid (i) The titration curve data in two columns (ii The graph of pH versus volume of titrant. weak acid (iii) In the data box include the value of pKa for the weak acid, the molarity of the which to and your guess of the identity of the weak acid. Possible unknown weak acids from choose from areExplanation / Answer
ans 2: First step: calculate the moles of acid
formula: (vol of base)X(1L/10^3 ml)X (xmol of base/1lL of base solution)X (1mol of unknown acid/ 1mol of base) = Ymoles of acid
2nd step: calculate the molarity:
Molarity of unknown acid = Ymoles of acid/ volume of acid.
Ans 3: Titration curve of triprotic acid ex H3PO4 will have three flat areas between equivalence point whereas mixture of three weak acids show the curve rises until equivalence point of most concentrated acid is approached.
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