A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

A 29.00−mL sample of an unknown H3PO4 solution is titrated with a 0.130M NaOH solution. The equivalence point is reached when 27.73mL of NaOH solution is added.What is the concentration of the unknown H3PO4 solution? The neutralization reaction is: H3PO4(aq)+3NaOH(aq)→3H2O(l)+Na3PO4

  • This Question is Closed
  1. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    first find the amount of moles of NaOH

  2. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    do you know how to do that?

  3. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yes i did but it keeps telling me my answer is wrong

  4. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    what did you get?

  5. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    thats not what i got

  6. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    The first step is to find the number of moles of NaOH

  7. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    0.13 mol/L x 0.02773L = 4.688mol

  8. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    The molar ratio is 1:3

  9. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so divide 4.688/3 = 1.563 mol of H3PO4

  10. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    The last step is to divide the moles by the volume

  11. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    1.563mol/0.029 L = 53.9 mol/L

  12. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Does that work?

  13. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    no problem :) Don't forget to metal

  14. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    *medal

  15. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.