How would you Calculate the H3O ion concentration in a solution with pH3 and a solution with pH8?

YellowBumblebee Answered First
In a solution, hydrogen ions normally bond with molecules of water, forming H3O+ (hydronium) ions. Thus, the concentration of the hydronium ions will be the same as the concentration of hydrogen ions, which is related to the pH of a solution according to the following equation: pH = -log[H+] = -log[H3O+] This equation can be solved for the concentration of hydronium ions: [H3O+] = 10-pH Thus, for a solution with a pH of 3, the concentration of hydronium ions will be 10-3 = 0.001 moles/liter, and for a solution with a pH of 8, the concentration of hydronium ions will be 10-8 = 0.00000001 moles/liter.

How much more solution is pH10 than pH8?

At pH = 10 there is 1*10-4 mol/L OH- At pH = 8 there is 1*10-6 mol/L OH- So at pH10 it is 100 times more OH- in this alkaline solution (and 100 times less H+)

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