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Author Topic: How do hydrogen ions contribute to pH?  (Read 30224 times)

Offline Quantum_Vaccuum

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How do hydrogen ions contribute to pH?
« on: 05/10/2007 01:55:33 »
How exactly do the ionized hydrogen atoms affect acidity?
« Last Edit: 01/01/2009 04:08:06 by chris »


 

Offline lightarrow

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Re: How do hydrogen ions contribute to pH?
« Reply #1 on: 05/10/2007 15:25:03 »
How exactly do the ionized hydrogen atoms affect acidity?
pH = -log10[H+]
where [H+] = concentration hydrogen ions.
 

Offline Chemistry4me

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Re: How do hydrogen ions contribute to pH?
« Reply #2 on: 26/12/2008 23:50:15 »
They attach to water molecules to form hydronium ions (H3O+) thats what makes a solution acidic.
 

Offline lancenti

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How do hydrogen ions contribute to pH?
« Reply #3 on: 05/01/2009 02:30:25 »
It might also be interesting to note that pH actually means "Power of Hydrogen" so the more Hydrogen ions you have in solution, the more acidic a solution is.

Based on the Lewis Definition, an Acid is a compound which accepts a lone pair of electrons. Hydrogen ions are positively charged and can take up a lone pair of electrons from another compound to form a covalent bond. So the more hydrogen ions you have, the more electron pairs you can accept and the more acidic it becomes.
 

Offline lightarrow

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How do hydrogen ions contribute to pH?
« Reply #4 on: 05/01/2009 15:27:19 »
It might also be interesting to note that pH actually means "Power of Hydrogen" so the more Hydrogen ions you have in solution, the more acidic a solution is.

Based on the Lewis Definition, an Acid is a compound which accepts a lone pair of electrons. Hydrogen ions are positively charged and can take up a lone pair of electrons from another compound to form a covalent bond. So the more hydrogen ions you have, the more electron pairs you can accept and the more acidic it becomes.
Do you also know at least one example of acid-base reaction not involving H+ ions?
 

Offline Chemistry4me

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How do hydrogen ions contribute to pH?
« Reply #5 on: 05/01/2009 23:40:46 »
Aluminium Trichloride (a Lewis acid) with Trimethylamine (a Lewis base) :)
 

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How do hydrogen ions contribute to pH?
« Reply #5 on: 05/01/2009 23:40:46 »

 

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