In: Chemistry
The pKa of formic acid was measured by titrating a 1.00 mM solution of formic acid with NaOH in the presence of varied concentrations of NaCl. The results are as listed:
NaCl (mM) | 10 | 25 | 50 | 100 | 200 |
pKa | 4.65 | 4.58 | 4.53 | 4.45 |
4.40 |
utilize a graphical method to determine the true pKa of formic acid (debye-huckle is valid)
Provide step by step instructions if excel is utilized.