A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

How many grams of calcium phosphate can be produced when 78.5 grams of calcium hydroxide reacts with excess phosphoric acid? Unbalanced equation: H3PO4 + Ca(OH)2 → H2O + Ca3(PO4)2 So I balanced the equation as 2H3PO4 + 3Ca(OH)2 = 6H2O + Ca3(PO4)2 but now I am stuck

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

    well, you start with 78.5 g of calcium hydroxide. our steps are: 1. convert 78.5g of calcium hydroxide to moles, using molar mass 2. divide moles of calcium hydroxide by 3, since it takes 3 moles of calcium hydroxide to produce 1 mole of calcium phosphate. this gives us the number of moles of calcium phosphate produced 3. multiply that by the molar mass of calcium phosphate to go from moles to grams

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

    So 78.5 g Ca(OH)2 x 74.093 g/mol = 5816.3 mol Ca(OH)2 5816.3 mol / 3 = 1938.8 mol Calcium Phosphate 1938.8 mol x 310.17g/mol = 601,357.6 g Am I right?

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

    no u are incooorect. Actually the no of moles are equal to mass divided by the molar mass so no of moles of Ca(OH)2 would be 78.5g/74.0932gmol^-1 I think u better correct ur answers from that point !

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

    Did u get where u went wrong ?

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

    Okay thank you so 78.5g / 74.093 g/mol = 1.06 mol Ca(OH)2 1.06 mol / 3 = .353 mol Ca3(PO4)2 .353 mol x 310.17 g/mol = 109.49 g Is this correct now?

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

    Exactly ! U got it right! :)

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

    Is that the answer?

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

    yep !

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

    YAY thank you so much can I ask you another one if you don't mind?

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

    Yeah post it as another question maybe ?

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

    okay i will

  12. 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.