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Electrons and pH

Posted: Fri Dec 06, 2019 12:23 am
by Ashley Osorio
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?

Re: Electrons and pH

Posted: Fri Dec 06, 2019 12:26 am
by Prasanna Padmanabham 4I
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.

Re: Electrons and pH

Posted: Fri Dec 06, 2019 12:37 am
by Ashley Osorio
Thanks!!