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

To find acidic and basic radicals in different chocolates, theory of the ac...

theory of the acidic and basic radicals in different chocolates

Ketone bodies conversion, I wish to convert beta hydroxy butyrate to either...

I wish to convert beta hydroxy butyrate to either acetoacetate/ acetone or any other forms to be detected using some dyes. Kindly help me.

ALIPHATIC CHEMISTRY, ACCOUNT FOR THE STABILITY OF CONJUGATED DIENES

ACCOUNT FOR THE STABILITY OF CONJUGATED DIENES

In a bohr''s model of atom when an electron, In a Bohr's model of atom when...

In a Bohr's model of atom when an electron jumps from n= 1  to n= 3  , how much energy will be emitted or absorbed: (1)  2.15 x10 -11 erg                          (2) 0.19

Lithium fluoride is less soluble in water, Lithium Fluoride is less soluble...

Lithium Fluoride is less soluble in water. But in some ways consider that when Lithium Fluoride dissolve in water, an alkaline solution will find. can u please explain that why thi

Solid , please give me a complete information about solid and extra informa...

please give me a complete information about solid and extra information

Organic chemistry, advantages and disadvantages of westron

advantages and disadvantages of westron

Periodic table, alkali metals belong to s-block in the periodic table ,why?...

alkali metals belong to s-block in the periodic table ,why?

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