Asked by Ashley
Nicotinic acid (niacin) is a monoprotic acid with the formula HC6H4NO2. A solution that is 0.012M in nicotinic acid has a pH of 3.39 at 25*C. What is the acid-ionization constant, Ka and pKa for this acid at 25*C?
Answers
Answered by
DrBob222
Write the ionization equation.
Prepare an ICE chart.
You know pH and this will give you (H^+), (nicotine ion), and nicotinic acid concn. Plug these into the Ka expression and solve for Ka, then pKa. Post your work if you get stuck.
Prepare an ICE chart.
You know pH and this will give you (H^+), (nicotine ion), and nicotinic acid concn. Plug these into the Ka expression and solve for Ka, then pKa. Post your work if you get stuck.
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