November 23, 2024, 07:42:41 PM
Forum Rules: Read This Before Posting


« previous next »
Pages: [1]   Go Down

Topic: Homework Help: pH dilution  (Read 5700 times)

0 Members and 1 Guest are viewing this topic.

g00ber

  • Guest
Homework Help: pH dilution
« on: December 01, 2004, 09:05:55 PM »
What is the pH of the solution formed by diluting 25.0 mL of 0.40 M NaOH to a final volume of 2.00 L?

Logged

Offline Mitch

  • General Chemist
  • Administrator
  • Sr. Member
  • *
  • Posts: 5298
  • Mole Snacks: +376/-3
  • Gender: Male
  • "I bring you peace." -Mr. Burns
    • Chemistry Blog
Re:Homework Help: pH dilution
« Reply #1 on: December 01, 2004, 11:19:50 PM »
You have to attempt the problem.
Logged
Most Common Suggestions I Make on the Forums.
1. Start by writing a balanced chemical equation.
2. Don't confuse thermodynamic stability with chemical reactivity.
3. Forum Supports LaTex

Offline AWK

  • Retired Staff
  • Sr. Member
  • *
  • Posts: 7976
  • Mole Snacks: +555/-93
  • Gender: Male
Re:Homework Help: pH dilution
« Reply #2 on: December 02, 2004, 01:20:27 AM »
Calculate a new concentration and take into account NaOH is a strong base.
Logged
AWK

bindy

  • Guest
Re:Homework Help: pH dilution
« Reply #3 on: December 04, 2004, 02:48:34 AM »
if 0.4M NaOH means the quantity of matter,then C(hydroxyl)=0.4/2=0.2Mol/L
Ph=14-POH=14+lg0.2=13.3010
Logged

Offline Donaldson Tan

  • Editor, New Asia Republic
  • Retired Staff
  • Sr. Member
  • *
  • Posts: 3177
  • Mole Snacks: +261/-13
  • Gender: Male
    • New Asia Republic
Re:Homework Help: pH dilution
« Reply #4 on: December 04, 2004, 08:17:25 PM »
Quote from: g00ber on December 01, 2004, 09:05:55 PM
What is the pH of the solution formed by diluting 25.0 mL of 0.40 M NaOH to a final volume of 2.00 L?

0.4M NaOH is diluted from 0.025L to 2L.

Concentration of diluted NaOH = 0.4 / (2/0.025) = 5 x 10-3

this should help you out.
Logged
"Say you're in a [chemical] plant and there's a snake on the floor. What are you going to do? Call a consultant? Get a meeting together to talk about which color is the snake? Employees should do one thing: walk over there and you step on the friggin� snake." - Jean-Pierre Garnier, CEO of Glaxosmithkline, June 2006
Pages: [1]   Go Up
« previous next »
Sponsored Links