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Topic: pH problem  (Read 4979 times)

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Offline spas105

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pH problem
« on: March 02, 2010, 01:26:09 AM »
If the [H30+] in solution a is 500 times the [H30+] of solution b....the pH of solution a is?
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Offline AWK

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Re: pH problem
« Reply #1 on: March 02, 2010, 01:44:10 AM »
Quote from: spas105 on March 02, 2010, 01:26:09 AM
If the [H30+] in solution a is 500 times the [H30+] of solution b....the pH of solution a is?
Unsolvable

Sorry, I didn't notice these are different solutions
« Last Edit: March 02, 2010, 04:00:43 AM by AWK »
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Offline spas105

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Re: pH problem
« Reply #2 on: March 02, 2010, 01:58:55 AM »
promise its solvable...its off a practice exam
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Offline sjb

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Re: pH problem
« Reply #3 on: March 02, 2010, 02:02:30 AM »
Perhaps not unsolvable, but indeterminate.

What equations do you know that relate [H3O+] to pH?
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Offline Borek

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Re: pH problem
« Reply #4 on: March 02, 2010, 03:19:33 AM »
You can't give an exact answer, all you can do is you can say what is pH difference between both solutions. Like

Quote from: spas105 on March 02, 2010, 01:26:09 AM
the pH of solution a is

1.5 units lower.

(which is NOT a correct asnwer).
« Last Edit: March 02, 2010, 03:39:45 AM by Borek »
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Offline spas105

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Re: pH problem
« Reply #5 on: March 02, 2010, 01:09:53 PM »
i apologize....yes its in terms ok pH units lower or higher than that of solution B....ex answer 5.00 pH units lower than the pH of solution B....sorry for the confusing it was a late night last night....thankyouuu
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Offline spas105

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Re: pH problem
« Reply #6 on: March 02, 2010, 01:10:46 PM »
confusion**
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Offline sjb

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Re: pH problem
« Reply #7 on: March 02, 2010, 04:19:41 PM »
Well, as I mentioned before,
Quote from: sjb on March 02, 2010, 02:02:30 AM
What equations do you know that relate [H3O+] to pH?
?
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Offline spas105

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Re: pH problem
« Reply #8 on: March 02, 2010, 04:32:04 PM »
none there is no equation
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Offline Borek

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Re: pH problem
« Reply #9 on: March 02, 2010, 04:43:20 PM »
What is pH definition?
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Offline spas105

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Re: pH problem
« Reply #10 on: March 02, 2010, 06:55:57 PM »
ph=-log(H30+) i dont know where to go from there
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Offline AWK

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Re: pH problem
« Reply #11 on: March 03, 2010, 01:44:14 AM »
As Borek said there is no solution for pH. There is solution for change of pH.
pH of solution a is lower than that of solution b by log(500)
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