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

Lab, need help answering questions for the lab

need help answering questions for the lab

Dyes, classes of azo dyes\

classes of azo dyes\

Atoms, what is the gram atomic mass of hydrogen and oxygen?

what is the gram atomic mass of hydrogen and oxygen?

Explain colligative properties of solutions, Q. Explain Colligative propert...

Q. Explain Colligative properties of Solutions? Colligative properties  of solutions are those properties which depend on the concentration of the solution rather that the ty

The wave nature of an electron was first given, The wave nature of an elect...

The wave nature of an electron was first given by: (1) De-Broglie (2)Heisenberg (3)Mosley (4)Sommerfield Ans:  De-Broglie

Periodic, where is the asterisk located

where is the asterisk located

Silver salt method for acids - chemical methods, Silver salt method for aci...

Silver salt method for acids - Chemical methods It is based upon the fact that silver salt of an organic acid on heating provides residue of metallic silver.

Briefly explain acid-base titration, Q. Briefly explain acid-base titration...

Q. Briefly explain acid-base titration ? Ans. A valuable laboratory technique used by chemists is called an acid-base titration. A titration is a process in which the c

#Ecell, In a Ecell, why do you flip the value of the smaller value?

In a Ecell, why do you flip the value of the smaller value?

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