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

Electrolysis process, working of electrolysis process? components of electr...

working of electrolysis process? components of electrolysis process? advantages and disadvantages of electrolysis process?

Molar conductivity, What do you understand by molar conductivity at infinit...

What do you understand by molar conductivity at infinite dilution

Dumas method., what is meant by dumas methad?give its functioning and uses

what is meant by dumas methad?give its functioning and uses

The formula of its chloride, The phosphate of a metal has the formula MHPO ...

The phosphate of a metal has the formula MHPO 4. The formula of its chloride would be: (1) MCl                                       (2)  MCl 2                 (

Explain bulking of sand, Explain Bulking of sand The presence of moistu...

Explain Bulking of sand The presence of moisture content to particular extent in sand increases the volume of sand. This is due to the fact that the moisture causes ?lm of wate

Factors that affects crystallization of organic compound, What are the 5 Fa...

What are the 5 Factors that affects crystallization of organic compounds?

#tit4-pyridinecarboxaldehyde.., synthesis, posted date 1/12/2013 7;26;41 pm...

synthesis, posted date 1/12/2013 7;26;41 pm\location ;austeralia

Polymers, giving correct formulas give the reactantsand products in the for...

giving correct formulas give the reactantsand products in the formation of poly2 butane

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