November 26, 2024, 09:24:03 PM
Forum Rules: Read This Before Posting


« previous next »
Pages: [1]   Go Down

Topic: Can someone check to see if I solved this pH prob. correctly?  (Read 2257 times)

0 Members and 2 Guests are viewing this topic.

Offline rubystar91

  • New Member
  • **
  • Posts: 4
  • Mole Snacks: +0/-0
Can someone check to see if I solved this pH prob. correctly?
« on: July 08, 2010, 01:45:37 PM »
If 22.5 mL of 1.4x10-4 M HI is added to 28.0 mL of 4.4x10-3 M HI, what is the pH of the solution?

Do I solve it this way?
1.4x10-4+4.4x10-3= 4.54x10-3 M HI
22.5mL+28.0mL=50.5mL=.0505L
4.54x10-3/.0505=0.089901
pH=log(0.089901)=1.05

Is that correct?

Logged

Offline sjb

  • Global Moderator
  • Sr. Member
  • ***
  • Posts: 3653
  • Mole Snacks: +222/-42
  • Gender: Male
Re: Can someone check to see if I solved this pH prob. correctly?
« Reply #1 on: July 08, 2010, 01:49:39 PM »
Quote from: rubystar91 on July 08, 2010, 01:45:37 PM
If 22.5 mL of 1.4x10-4 M HI is added to 28.0 mL of 4.4x10-3 M HI, what is the pH of the solution?

Do I solve it this way?
1.4x10-4+4.4x10-3= 4.54x10-3 M HI
22.5mL+28.0mL=50.5mL=.0505L
4.54x10-3/.0505=0.089901
pH=log(0.089901)=1.05

Is that correct?



No, I don't believe it is. You can't just add molarities like that.

How many moles of HI are there in your first solution? And in your second? In what total volume?
Logged
Pages: [1]   Go Up
« previous next »
Sponsored Links