Molarities of Solutions: Solution NaOH HCI Molarity 0100 M 0.100 100 Titration o

Question

Molarities of Solutions: Solution NaOH HCI Molarity 0100 M 0.100 100 Titration of Hydrochloric Acid: 5.000mlShow how you mL base needed to reach the equivalence point determined this volume from your titration curve Turn in your computer generated plot of pH vs. Volume from DataStudio along with your data. For each point shown below in the titration, record your measured pH from your data and then calculate the pH of the solution. Show your work for all calculations in the space provided 1) What was the pH of the hydrochloric acid before any base was added? Measured pH1359 Calculations: Calculated pH = on CL OUM) 2) What was the pH after 10.0 mL of sodium hydroxide solution were added? Measured pH = Calculated pH Calculations:

Explanation / Answer

Q2

from the graph

V= 10 mL

then

pH = 1.6 approx

calcualted pH:

pH = pKa + log(a-/HA)

pKa= 4.75

´mmol of base = MV = 0.1*10 = 1

mmol of acetic acid left = 25*0.1 = 25 -1 = 24

pH = 4.75 + log(1/24)

pH = 3.37

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