Find the ph value, Chemistry

50ml of 0.1M NH4OH ,25ml NH4Cl weere used to make a buffer . what is the PH is if Pkbis 4.8?

Solution) The given buffer is a base buffer

[NH4OH] =[(50*0.1)/75]

[NH4Cl] =[(25*2)/75]

From the principle V1M1=V2M2

For a base buffer pOH = pKb + log [Salt/Base]

thus pOH 4.8+ log [{(25*2)/75}/{(50*0.1)/75}] = 4.8+ log (10) = 4.8+1 =5.8

Therefore pH = (14-pOH) = (14-5.8) = 8.2

Posted Date: 3/12/2013 3:34:45 AM | Location : United States







Related Discussions:- Find the ph value, Assignment Help, Ask Question on Find the ph value, Get Answer, Expert's Help, Find the ph value Discussions

Write discussion on Find the ph value
Your posts are moderated
Related Questions
Reactions of Alkaline earth metals with oxygen: Write the reactions of any two elements of group II A with oxygen. Ans. Alkaline earth metals react with oxygen to form corr

the complete equation for forming a peptide bond through dehydration

deffination and example

(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) B

comparisons of aas and aes

Classification of polymers - Thermoplastics These are the polymers that can be simply softened repeatedly while heated and hardened when cooled along with little change in the

The table below gives intrinsic viscosity values explained by viscometry and weight- average molar mass values explained under the similar  conditions by static light scattering

The number of electrons in the valence shell of calcium is: (1) 6        (2) 8        (3) 2        (4)4 Ans: 2

Bohr's model can explain : (1) The spectrum of hydrogen atom only    (2) Spectrum of atom or ion containing one electron only  (3) The spectrum of hydrogen molecule  (4

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