You need to prepare an acetate buffer of pH 6.28 from a 0.700 M acetic acid solution and a 2.47 M KOH solution. If you have 825 mL of the acetic acid solution, how many milliliters of the KOH solution do you need to add to make a buffer of pH 6.28? The pKa of acetic acid is 4.76.
2. Corrected_text: How many grams of dipotassium succinate trihydrate (K2C4H4O4·3H2O, MW = 248.32 g/mol) must be added to 730.0 mL of a 0.0301 M succinic acid solution to produce a pH of 5.930? Succinic acid has pKa values of 4.207 (pKa1) and 5.636 (pKa2).