Magnesium (Mg) has atomic number 12 with electronic configuration :
The valence shell of Mg is 3s which has 2 electrons as shown in above electronic configuration.
Therefore, A = 3 and B =2
Initially, scientists described atoms as the smallest particles of matter. However smaller particles within atoms were
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Answer:
Amount of pyridine required = 0.0316 M
Explanation:
pH of a buffer solution is calculated by using Henderson - Hasselbalch equation.
Pyridinium is a weak acid and in the presence of its conjugate base, it acts as buffer.
Henderson - Hasselbalch equation for pyridine/pyridinium buffer is as follows:
pH = 4.7
(Pyridinium)=0.100 M
Substitute the values in the formula
[Py]=0.0316\ M
Amount of pyridine required = 0.0316 M
