Posted: Thu Jan 24, 2019 4:11 pm
At what concentration of equilibrium hydronium ions must we consider the autoprotolysis of water as being an important factor in pH calculation. Is it 10^-6 or 10^-7?
Created by Dr. Laurence Lavelle
monikac4k wrote:If a weak acid deprotonates and releases less than 10^-7 M of hydronium, then you would consider autoprotolysis. This is because if you ignore autolysis and calculate pH of an acid that creates 10^-9 M hydronium, then the pH would be basic. This would not make sense since there is an acid in the solution. To fix this error, you consider the hydronium ions from autoprotolysis and you should get a more acidic pH.