Asolution that is 0.17m in hcho2 and 0.11 min in nacho2

Hello!

(Missing Previous Enunciate) Use the Henderson-Hasselbalch equation to find the pH of: 

To solve this question we need the pKa of HCOOH, which is 3,75, now, we can apply the Henderson-Hasselbach equation:



So, the pH of a solution that is 0,17 M in HCHO₂ and 0,11 M in NaCHO₂ is 3,56

Have a nice day!

☆ionisation energy increases across a period from na -> ar☆ionisation energy decreases down a group from li -> fr☆ionic radius decreases across a period from na -> cl☆ionic radius increases down a groupfrom f -> ii hope it clarifies your doubts