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Topic: ph word problem (Read 5391 times)
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dathrilla
Guest
ph word problem
«
on:
May 25, 2006, 03:23:08 PM »
Hi!
I don't know how to find the ph level when adding two substances together...
the question is the following: 10 ml of water is added to 25ml of a solution of whom the pH is 2.3. What does the pH turn into?
Cordially,
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Borek
Mr. pH
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Re: ph word problem
«
Reply #1 on:
May 25, 2006, 03:42:18 PM »
Due to the reasons you are probably not yet aware off, this question has no answer. However, assuming oversimplified picture of the solution...
Think how H
+
concentration will change when diluting solution, and how does H
+
translate to pH.
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ChemBuddy
chemical calculators - stoichiometry, pH, concentration, buffer preparation,
titrations.info
dathrilla
Guest
Re: ph word problem
«
Reply #2 on:
May 25, 2006, 03:50:42 PM »
Thanks for replying.
However, there is an answer of 2.44 pH proposed for this question.
I'm still not absolutely sure on how to resolve this problem; any indication would be highly appreciated Borek, I still have a few questions left in this genre. Thanks
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Borek
Mr. pH
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Re: ph word problem
«
Reply #3 on:
May 25, 2006, 04:46:18 PM »
pH = -log([H
+
])
so
[H
+
] = 10
-pH
Calculate [H
+
] in the solution of pH 2.3, calculate new concentration of H
+
after dilution, calculate pH for the new solution.
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ChemBuddy
chemical calculators - stoichiometry, pH, concentration, buffer preparation,
titrations.info
dathrilla
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Re: ph word problem
«
Reply #4 on:
May 25, 2006, 05:01:38 PM »
Thanks bro, got it.
Have a good one...
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Donaldson Tan
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Re: ph word problem
«
Reply #5 on:
June 03, 2006, 02:38:20 AM »
the essential assumption in solving this problem is the number of H+ ions is conserved.
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