Electrons and pH

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Ashley Osorio
Posts: 54
Joined: Thu Jul 11, 2019 12:17 am

Electrons and pH

Postby Ashley Osorio » Fri Dec 06, 2019 12:23 am

NH3 is basic with an 11 pH. When an electron is added, creating NH4+, the pH decreased and it became more acidic. Why did adding an electron do this to the acidity?

Prasanna Padmanabham 4I
Posts: 111
Joined: Thu Jul 25, 2019 12:17 am

Re: Electrons and pH

Postby Prasanna Padmanabham 4I » Fri Dec 06, 2019 12:26 am

When the equation is NH4+ + H2O --> NH3 + H3O+
You notice how the NH4 is donating a Hydrogen. pH is the -log[H+] so as the concentration of H+ increases, then the pH decreases. NH4+ is a proton donator and therefore the concentration of H+ increases which then decreases the pH.

Ashley Osorio
Posts: 54
Joined: Thu Jul 11, 2019 12:17 am

Re: Electrons and pH

Postby Ashley Osorio » Fri Dec 06, 2019 12:37 am

Thanks!!


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