3) What is the theoretical m HCI with 0.010 M NaOH ? aximum and minimum pH one c

Question

3) What is the theoretical m HCI with 0.010 M NaOH ? aximum and minimum pH one could expect in a titration of 0.010 M the equivalence point of 0.010 M HC? with 0.010 M NaOH? What should be the pH at Would the pH be higher, lower, or the same if 0.10 M solutions were used? 4) Look up and record the K, for the following acids. Record them here AND in the appropriate part of the calculation section of the lab report. 5) Formic Acid (Methanoic acid) Acetic Acid (Ethanoic acid) Propanoic Acid Ka Ka- If 0.10 M solutions of either of these three acids is titrated with 0.10 M NaOH, would the pH at the equivalence point be greater than, less than, or equal to 7? may provide some guidance.) 6) (Hint the diagram in the lab

Explanation / Answer

3)

HCl is a strong acid.

[H+] = [HCl]

NaOH is a strong base.

[OH-] = [NaOH]

Initial pH is due to presence of HCl.

pH = -log[H+] = - log(0.010 ) = 2.00

Final pH is due to presence of NaOH.

pOH = -log[OH-] = -log(0.010) = 2.00

pH = pKw - pOH

pKw for water is 14.00

pH = 14.00 - 2.00 = 12.00

So, the maximum pH is 12.00 and the minimum pH is 2.00.

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