According to Henderson – Hasselbalch equation: pOH = pKb + log (/ ) pKb = – log Kb = – log .85 x 10-5 = 4.733 Therefore, pOH = 4.733…
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…
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…
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…
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…
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…
The mass of an electron moving at a velocity much smaller than the velocity of light is known as rest mass. It is calculated by the relation:- M=e/ (e/m) =9.1091X10-31…
When careful experiments were carried out using perforated cathode in the discharge tube, a new type of rays known as anode rays were revealed. These rays after emitted by anode…
Ernest Rutherford performed an experiment in 1911 to know more about the structure of atom. He made a narrow beam of α particles (obtained from polonium) to strike an extremely…
Chadwick performed the same experiment of Rutherford but with beryllium/boron sheet few years after Rutherford’s. He found that new particles carrying no charge and mass almost equal to proton were…
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