Can someone explain to me what this means that was said in lecture today:
"If [H3O+] < 10-7, then it is considered neutral because we now autoprotlysis generates 10-7 mol/l H3O+"
[H3O+] > 10-7
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GabrielGarciaDiscussion1i
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Re: [H3O+] > 10-7
It means that if an extremely weak acid contributes a concentration of [H30+] < 10^-7, then the compound is still considered ESSENTIALLY neutral because with water autoprotolysis, the [H30+] is 10^-7 and then adding 10^-12 is so insignificant that the [H30+] is still essentially the same.
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Juanalv326
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Re: [H3O+] > 10-7
Another way of saying it is that -logpH=10^(-pH), so because you saw that the 10^ is (-7) it means that the pH is 7
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