Henderson-hasselbalch equation, Chemistry

Assignment Help:

(a) Explain in terms of ionic equilibria why the aqueous solution of a salt derived from a weak acid and a strong base (e.g. sodium phenolate) has a pH greater than 7.

(b) By considering the equilibrium constant (Ka) of a weak acid, and the effect on Ka when a salt of that acid is added to the solution, derive the Henderson-Hasselbalch equation for buffer solution pH.

(c) Explain why the Henderson-Hasselbalch equation sometimes features a term written as + log10 gA- where gA- represents the activity coefficient of the common anion, and hence describe the effect of increasing the concentration of both the acid and salt in the buffer formulation on buffer performance.

(d) An aqueous buffer solution is formulated containing 0.010 mol dm-3 sodium phenolate to which phenol is added. Given that the pKa of phenol is 9.98, calculate the concentration of phenol required to produce a pH of exactly 9.65 (you may assume that gA- = 1).


Related Discussions:- Henderson-hasselbalch equation

Stage of research prior to drug development, Problem 1: Briefly describ...

Problem 1: Briefly describe about the stage of research prior to drug development. Definition of drug development Stage of research prior to drug development P

Calculate the feed rate of water, Liquid-liquid extraction is used to separ...

Liquid-liquid extraction is used to separate acetone and MIBK. A mixture of acetone and MIBK is fed to a mixing tank at a rate of 100 kg/min. Pure water is also fed to the tank and

Moist silver oxide or dry silver oxide, Ethyl bromide can be converted into...

Ethyl bromide can be converted into ethyl alcohol using- Moist silver oxide or dry silver oxide?

Nitrenes, tell me the methods of preparation of nitrenes?

tell me the methods of preparation of nitrenes?

Interactive periodic table, Interactive periodic table In this interact...

Interactive periodic table In this interactive periodic table animation you can view details of all components through clicking on it. You can select the colored through option

Discuss cohesive energy and electron affinity, Discuss "cohesive energy" an...

Discuss "cohesive energy" and "electron affinity". ‘Cohesive energy’:  In a chemical bond, it’s the energy required to dissociate a solid into isolated atoms or molecules as ap

The following explains light both as a stream of particles, Which one of th...

Which one of the following explains light both as a stream of particles and as wave motion: (1) Diffraction (2) γ= h/p (3) Interference    (4) Photoelectric effect

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd