Hellow guys, Welcome to my website, and you are watching ⚗️ Calculating the pH of a Buffer Solution Using the Henderson–Hasselbalch Equation. and this vIdeo is uploaded by Study Force at 2019-04-15T16:49:47-07:00. We are pramote this video only for entertainment and educational perpose only. So, I hop you like our website.
| Name | ⚗️ Calculating the pH of a Buffer Solution Using the Henderson–Hasselbalch Equation |
| Video Uploader | Video From Study Force |
| Upload Date | This Video Uploaded At 15-04-2019 23:49:47 |
| Video Discription | ✔ https://StudyForce.com ✔ https://Biology-Forums.com ✔ Ask questions here: https://Biology-Forums.com/index.php?board=33.0 Follow us: ▶ Facebook: https://facebook.com/StudyForcePS/ ▶ Instagram: https://instagram.com/studyforceonline/ ▶ Twitter: https://twitter.com/studyforceps *Calculating the pH of a Buffer Solution as an Equilibrium Problem and with the Henderson–Hasselbalch Equation* Q1. Calculate the pH of a buffer solution that is 0.050 M in benzoic acid (HC7H5O2) and 0.150 M in sodium benzoate (NaC7H5O2). For benzoic acid, Ka = 6.5 × 10−5. What you'll need: Henderson-Hasselbalch Equations: pH=pK_a+log〖([base])/([acid])〗 • K_a is the acid dissociation constant • pK_a is the pH at which 50% of a substance is ionized • pK_a=−log(K_a ) Q2. Calculate the pH of a buffer solution that is 0.250 M in HCN and 0.170 M in KCN. For HCN, Ka = 4.9 × 10−10 (pKa = 9.31). Use both the equilibrium approach and the Henderson–Hasselbalch approach. To find the pH of this solution, determine which component is the acid and which is the base and substitute their concentrations into the Henderson–Hasselbalch equation to calculate pH. HC7H5O2 is the acid and NaC7H5O2 is the base. Therefore, you can calculate the pH as follows: Confirm that the x is small approximation is valid by calculating [H3O+] from the pH. Since [H3O+] is formed by ionization of the acid, the calculated [H3O+] has to be less than 0.05 (or 5%) of the initial concentration of the acid. The approximation is valid. |
| Category | Education |
| Tags | study force | biology forums | study force academy | studyforce.com | biology-forums.com | Henderson–Hasselbalch Approach | Calculating the pH of a Buffer Solution |
