A 0.9600 M NaOH solution was diluted with a factor of 4. Then the diluted solution of NaOH was titrated against an unknown acid. The volumes of NaOH(aq) titrated are shown in the table below. Volumes of NaOH(aq): Rough titration First titration Second titration Third titration Third titration Final burette reading: (mL) 19.00 34.05 20.86 36.01 23.57 Initial burette reading: (mL) 19.00 19.07 5.76 21.02 8.54 The molarity of the unknown acid is 0.08108 M and the volume of the unknown acid used in each titration is 14.80 mL. (i) Was the unknown acid monoprotic, diprotic or triprotic? Show your calculations and reasoning.

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Q: What is the concentration of the unknown HCl solution in M?

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A: As per rule, allowed to answer first question and post the remaining in the next submission.

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A: D option is correct. pH = 2.15 so, nearly solution is 2.11.

Q: Question 1

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Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.