The pH of the solution created is 7.21
Explanation:
Ka1 = 6.9 X 10⁻³
Ka2 = 6.2 X 10⁻⁸
Ka3 = 4.8 X 10⁻¹³
pKa = - log( Ka)
Thus,
pKa1 = - log ( 6.9 X 10⁻³) = 2.16
pKa2 = - log ( 6.2 X 10⁻⁸ ) = 7.21
pKa3 = - log ( 4.8 X 10⁻¹³ ) = 12.3
KH₂PO₄ + Na₂HPO₄ = KH₃PO₄ + Na₂PO₄
Ka2 = [ KH₃PO₄] [Na₂PO₄] / [KH₂PO₄] [Na₂HPO₄]
log (Ka2 ) = log [[ KH₃PO₄] [Na₂PO₄] / [KH₂PO₄] [Na₂HPO₄]]
pH = pKa2 + log [KH₂PO₄] /[Na₂HPO₄] = 7.21
Therefore, the pH of the solution created is 7.21
A.) 3.14 mol
B.) 6.28 mol
C.) 12.6 mol
D.) 25.2 mol
The sulfur (S) element of the periodic table is represented by the electron configuration .
The arrangement of electrons within the energy levels or orbitals of an atom is represented by electronic configuration. Sulfur has 16 electrons in its structure. The numbers in the electronic configuration represent the principal energy levels—1, 2, and 3—as well as the orbital—s or p—that the electrons are in.
Detail analysis of electron arrangement:
When these electronic configurations are combined, the electron configuration of sulfur (S) is represented by .
Learn more about Electronic configuration, here:
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Count the number of electrons = 2+2+6+2+2= 14
So, it must be SILICON.