Can someone explain why solutions of weak acids have higher pH values than solutions of strong acids at the
same concentration?
pH values of weak and strong acids
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Re: pH values of weak and strong acids
A higher pH means a lower concentration of Hydrogen ions (protons). To go from pH to [H3O+], you calculate 10^(-pH). Therefore the higher the pH value, the lower the concentration of [H3O+] and the lower the acidity.
I'm not sure if this answers what you were asking, but I hope it helps.
I'm not sure if this answers what you were asking, but I hope it helps.
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Re: pH values of weak and strong acids
Because weak acids do not dissociate completely, some concentration of a weak acid would produce less H3O+ than the same concentration of a strong acid. Therefore, the concentration of H3O+ will be lower with the weak acid, so the pH will be higher.
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Re: pH values of weak and strong acids
Since weak acids do not dissociate as much as strong acids, there is a smaller concentration of H+ ions in weak acids, leading to a higher pH.
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Re: pH values of weak and strong acids
Acids with higher pH levels take longer to dissociate, therefore they solution is less neutral. So overall stronger acids are easily broken down in a reaction compared to weak acids.
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Re: pH values of weak and strong acids
pH is a -log[H+], which simply means that a lower pH is actually associated with a higher number of H+ ions. So saying a weaker acid has a higher pH actually means it has a lower concentration of H+ ions.
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Re: pH values of weak and strong acids
Acids make solutions that have a pH from 1-7, stronger acids making lower pH values than weak acids. pH doesn’t depend on concentration, but the strength of the acid/base.
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