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

Decomposed at a lower temperature, Why li 2 CO 3 decomposed at a lower tem...

Why li 2 CO 3 decomposed at a lower temperature whereas Na2CO3 at higher temp?

Coordination complexes, iupac naming of ten bridged ligand containg complex...

iupac naming of ten bridged ligand containg complexes with their formulas

ELECTRO CHEMISTRY, WITH THE HELP OF A GRAPH, STATE THE DEVIATION OF MOLAR C...

WITH THE HELP OF A GRAPH, STATE THE DEVIATION OF MOLAR CONDUCTIVITY OF STRONG AGAINST WEEK ELECTROLYTE.

Synthetic detergents - oils and fats, Synthetic Detergents - Oils and Fats ...

Synthetic Detergents - Oils and Fats The synthetic Syndets or detergents are substitutes of soaps. They comprise cleansing power as good or better as compared to ordinary soaps

Project, to study the presence of aroma,taste, ph value and tannic acid of ...

to study the presence of aroma,taste, ph value and tannic acid of different tea leaves

Explain pauli exclusion principle, Q. Explain Pauli Exclusion Principle? ...

Q. Explain Pauli Exclusion Principle? When assigning electron configurations, it is essential to consider the two important principles concerning electrons in orbitals:

Calculation of radiations received by a panel using solrad, a. Calculate th...

a. Calculate the global radiation density (kWh/m 2 ) received by five panels located in San Jose on July 1, 2012: Panel A: Tilt=37.3 o , Azimuth=180 o (South) Panel B: Ti

Determine the electronic configuration, An element X with the electronic co...

An element X with the electronic configuration  1s 2 , 2s 2 , 2p 6 , 3s 2 ,  would be expected to form the chloride with the formula: (1) XCl 3     (2)  Xcl 2   (3) XCl

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