April 29, 2024, 10:24:25 AM
Forum Rules: Read This Before Posting


« previous next »
Pages: [1]   Go Down

Topic: pH problem  (Read 4772 times)

0 Members and 1 Guest are viewing this topic.

Offline spas105

  • Regular Member
  • ***
  • Posts: 17
  • Mole Snacks: +0/-0
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?
Logged

Offline AWK

  • Retired Staff
  • Sr. Member
  • *
  • Posts: 7979
  • Mole Snacks: +555/-93
  • Gender: Male
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 »
Logged
AWK

Offline spas105

  • Regular Member
  • ***
  • Posts: 17
  • Mole Snacks: +0/-0
Re: pH problem
« Reply #2 on: March 02, 2010, 01:58:55 AM »
promise its solvable...its off a practice exam
Logged

Offline sjb

  • Global Moderator
  • Sr. Member
  • ***
  • Posts: 3652
  • Mole Snacks: +222/-42
  • Gender: Male
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?
Logged

Offline Borek

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Posts: 27665
  • Mole Snacks: +1801/-410
  • Gender: Male
  • I am known to be occasionally wrong.
    • Chembuddy
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 »
Logged
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info

Offline spas105

  • Regular Member
  • ***
  • Posts: 17
  • Mole Snacks: +0/-0
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
Logged

Offline spas105

  • Regular Member
  • ***
  • Posts: 17
  • Mole Snacks: +0/-0
Re: pH problem
« Reply #6 on: March 02, 2010, 01:10:46 PM »
confusion**
Logged

Offline sjb

  • Global Moderator
  • Sr. Member
  • ***
  • Posts: 3652
  • Mole Snacks: +222/-42
  • Gender: Male
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?
?
Logged

Offline spas105

  • Regular Member
  • ***
  • Posts: 17
  • Mole Snacks: +0/-0
Re: pH problem
« Reply #8 on: March 02, 2010, 04:32:04 PM »
none there is no equation
Logged

Offline Borek

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Posts: 27665
  • Mole Snacks: +1801/-410
  • Gender: Male
  • I am known to be occasionally wrong.
    • Chembuddy
Re: pH problem
« Reply #9 on: March 02, 2010, 04:43:20 PM »
What is pH definition?
Logged
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info

Offline spas105

  • Regular Member
  • ***
  • Posts: 17
  • Mole Snacks: +0/-0
Re: pH problem
« Reply #10 on: March 02, 2010, 06:55:57 PM »
ph=-log(H30+) i dont know where to go from there
Logged

Offline AWK

  • Retired Staff
  • Sr. Member
  • *
  • Posts: 7979
  • Mole Snacks: +555/-93
  • Gender: Male
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)
Logged
AWK
Pages: [1]   Go Up
« previous next »
Sponsored Links