Calculate the pH of the following acid-base buffers a. 100 mL of 0.025 M formic acid and 0.015 M sodium formate b. 50.00 mL of 0.12 M NH3 and 3.50 mL of 1.0 M HCI c. 5.00 g of NaCO3 and 5.00 g of NaHCO3 in 0.100 L