A weak acid HA has a Ka of 3.8×10-9. where A- is the conjuga…
A weak acid HA has a Ka of 3.8×10-9. where A- is the conjugate base. The salt NaA has a fw=197.2 g/mol. A buffer is made by dissolving 18.22 g of solid NaA in 400.0 mL of 0.350 M HA solution. Assume the volume stays constant when the solid is dissolved. A. What is the pH of this buffer? B. The pH is changed to 7.50 by adding a certain amount of . (type in the blank one of these choices: strong acid, strong base, water) C. What is the ratio of conjugate base to acid at this new pH? Give a decimal answer with correct sig figs. Show work on your upload that supports your answers. Partial credit is possible!