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

Periodic table, give me two examples of compounds formed by s - blockmetals...

give me two examples of compounds formed by s - blockmetals

photochemistry, Applications of photochemistry in day today lif

Applications of photochemistry in day today life

Explain about the interstitial defects, Explain about the interstitial defe...

Explain about the interstitial defects An interstitial is an atom that occupies a place outside the normal lattice position. It might be the similar type of atom as the others

Beer lambartslambart''s law, Plz tell me the units of absorptivity if it ha...

Plz tell me the units of absorptivity if it has any units

Define the term - extrusion, Define the term - Extrusion It is a meta...

Define the term - Extrusion It is a metal working process that produces long lengths of uniform cross sectional area from a metal billet by causing the latter to flow under h

GRAPHITE FURNACE AAS, What are the advantages of graphite furnace AAS? tell...

What are the advantages of graphite furnace AAS? tell the history of graphite furnace AAS

Displacement of electron in covalent bond, a complete explnation about ind...

a complete explnation about inductive effect with example

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