Define Buffer Action?
admin Buffer action: the ability of the buffer solution to resist the changes in pH value on the addition of small amount of an acid or a base is known as…
Derive Henderson – Hasselbalch equation?
We can derive a general equation for calculating the pH of any buffer solution. Consider a mixture of weak acid (HX) and its conjugate base. HX + H2O ⇌ H3O+…
The salt of strong acid and strong base does not undergo hydrolysis. Explain.
In this case, neither the cations nor the anion undergoes hydrolysis. Therefore, the solution remains neutral. For example: in the aqueous solution of NaCl, its ions Na+ and Cl– ions…
The ionization constant of formic acid is 1.8 x 10-4. Around what pH will its mixture with sodium formate give buffer solution of higher capacity? Calculate the ratio of sodium formate and formic acid in a buffer of pH 4.25.
Buffer capacity is defined as the rate of change of pH with number of moles of acid or base added. Buffer capacity = dpH / dn acid or base dpH…
Calculate the pH of a buffer solution containing 0.2 mole of NH4Cl and 0.1 mole of NH4OH per litre. Kb for NH4OH = 1.85 x 10-5.
According to Henderson – Hasselbalch equation: pOH = pKb + log (/ ) pKb = – log Kb = – log .85 x 10-5 = 4.733 Therefore, pOH = 4.733…
What Is The Importance Of Standards In Physical Chemistry?
In physical chemistry, there is always a need to measure physical quantities and these measurements involves a numerical ratio between two samples of quantity; one which has to be measured…
What Is International System of Units?
With scientific research going all over the world, the communication is very important. This communication becomes very easy if there is an agreement on international level regarding the use of…
What Is The Difference Between Derived And Subsidiary Units?
Those units which are derived from the basic units of SI system are known as Derived units. For example: – the units of area are m2, which are derived from…
What Are Electrons And What Is J.J Thompson’s Contribution Towards Its Discovery?
A Few years back, we didn’t know the structure of atom; in fact John Dalton considered it to be as hardand dense and as the smallest and indivisible part of…
How The Charge On Electron Was Determined By Robert Millikan?
Millikan used his famous oil drop technique to determine the charge on an electron. In this experiment, an air containing chamber is injected with an oil spray consisting of microscopic…