What is the pH of a solution prepared by mixing 200 ml of 0.1 M HCl with 300 ml of 0.1 M sodium acetate and diluting the mixture to 1 L? The pKa of acetic acid is 4.76
Buffers are important physiological compounds that resist a change in pH. Calculate the pH of system that is 0.25 M benzoic acid and 0.75 M benzoate if the pKa = 4.2.
If 5 ml of 0.1 M NaOH (a strong base) is added to 100 ml of 0.05 M phosphate buffer (phosphoric acid = H3PO4), pH 7.1, what is the resulting pH? Ignore the volume change. Clearly identify the appropriate acid and conjugate base and determine their concentrations in the final solution.
What would the resulting pH be if instead you added 5 ml of 0.25 M HCl? (Ignore the volume change).