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Posted: **Mon Jul 11, 2022 2:03 pm**

: 4 20 Points A 1 00l Buffer Composed Of 0 13 Mol Hcn And 0 14 Mol Cn Has A Ph 9 39 Determine The Pka Of The Acid Ca 1 (36.75 KiB) Viewed 42 times

4. (20 points) A 1.00L buffer composed of 0.13 mol HCN and 0.14 mol CN- has a pH=9.39. Determine the pKa of the acid. Calculate the pH of this buffer after 0.040 mol of HCl have been added. Calculate the pH of this buffer after 0.040 mol of NaOH have been added.