What is the equilibrium constant of pure water at 25°C?
2 answers:
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The magnesium atom looses two electrons which are accepted by each of the fluorine atoms. (Option D).
<h3>What is an ionic bond?</h3>An ionic bond is formed when two ions are formed by the loss or gain electrons. In this case, magnesium has to loose two electrons while fluorine will gain two electrons.
Thus, the correct steps in the formation of an ionic bond between these atoms are A magnesium atom donates two electrons to the fluorine atoms → Each fluorine atom accepts one of the electrons → The magnesium atom becomes a +2 ion → Each fluorine atom becomes a -1 ion (Option D).
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<u>Answer:</u> To calculate the pH of the buffer composed of , we use the
<u>Explanation:</u>
Phosphoric acid is a triprotic acid and it will undergo three dissociation reaction each having their respective dissociation constants.
The chemical equation for the first dissociation reaction follows:
The chemical equation for the second dissociation reaction follows:
The chemical equation for the third dissociation reaction follows:
To form a buffer composed of , we use the
of second dissociation process
To calculate the , we use the equation:
To calculate the pH of buffer, we use the equation given by Henderson Hasselbalch:
We are given:
= negative logarithm of second acid dissociation constant of phosphoric acid = 7.21
= concentration of conjugate base
= concentration of weak acid
Hence, to calculate the pH of the buffer composed of , we use the