Answer:
Answers are in the explanation
Explanation:
The equilibriums corresponding for each ionization are:
H₃PO₄ ⇄ H₂PO₄⁻ + H⁺ pka: 2,15
H₂PO₄⁻ ⇄ HPO₄²⁻ + H⁺ pka: 7,20
HPO₄²⁻ ⇄ PO₄³⁻ + H⁺ pka: 12,35
At pH 5,7 all H₃PO₄ reacts to produce H₂PO₄⁻ and the consumed H₂PO₄⁻ to form HPO₄²⁻ is not relevant yet. Thus, dominant for is <em>H₂PO₄⁻</em>
I hope it helps!
Explanation:
This is the description of the equilibrium constant equation. For example:
Given a generic reaction:
Where A.B,C and D are the reactants and products and a,b,c and d are their stoichiometric coefficients. The equilibrium constant of this reaction will be:
<em>Note: is important to have in mind that the substances in solid or liquid (pure) state should not be included in the K equation.</em>
Explanation:
Formula for work done is as follows.
W =
where, k = proportionality constant =
d = separation distance = 0.45 nm =
Now, we will put the given values into the above formula and calculate work done as follows.
W =
=
=
Thus, we can conclude that work required to increase the separation of the two ions to an infinite distance is .