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Topic: pH Change Effects  (Read 1592 times)

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Offline offlinedoctor

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pH Change Effects
« on: September 15, 2012, 11:15:45 PM »
For the question, 'Explain why change in pH is less when 10ml of 0.1M Propanoic Acid is diluted to 100ml, then when 10ml of 0.1M Hydrochloric Acid is diluted to 100ml?

I've always thought that for weaker acids, diluting it would cause a greater pH change then stronger acids, due to really weak ionisation... (assuming my assumption is right...)  ???
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Offline Hunter2

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Re: pH Change Effects
« Reply #1 on: September 16, 2012, 02:59:52 AM »
Keyword is dissociation degree.

HCl has 100% dissociation. Organic acids have less then 100%.
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Offline Borek

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Re: pH Change Effects
« Reply #2 on: September 16, 2012, 04:23:21 AM »
Think how the dissociation degree changes with the concentration.
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