A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

UnbelievableDreams

  • one year ago

I need help with Chemistry.

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

    1. When 25.6 g of Al(OH)3 and 25.6 g of H2SO4 are reacted, how many moles of Al2(SO4)3 can be produced? 2. When 55.8 g of H2SO4 and 35.8 g of Al(OH)3 are reacted, how many grams of Al2(SO4)3 are produced? 3. In a reaction vessel, 3.4 mol of Al(OH)3 and 7.3 mol of H2SO4 react. Determine which substances, and their molar quantities, will be present in the container when the reaction goes to completion. Moles of Al2(SO4)3 in container: Moles of H2O in container: Moles of excess reactant in container: 2 Al(OH)3 + 3 H2SO4 ---> Al2(SO4)3 + 6 H2O <--- Balanced equation

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

    @Photon336

  3. Photon336
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Will help out in a bit!

  4. Photon336
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    First step: Balance your equation: 2Al(OH)3 + 3H2SO4 ------> 6H2O + Al2(SO4)3

  5. Photon336
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    In this problem you may have something called a limiting reagent. The limiting reagent is the compound that you have fewer moles for and runs out first. So you use the number of moles of the limiting reagent to find how many moles of Product you have. But first try to find how many moles of al(OH)3 and h2SO4 you have

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

    Can you tell me all of these steps? I will be back in an hour because of my grandfather. Please help me. Thank you so much.

  7. Photon336
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Sure. Give me about 45 min!

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

    Thanks a bunch.

  9. Photon336
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Take a look at what I wrote, it's a little messy but ask questions.

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

    @Photon336 I am back. So the question 1 is 0.255 moles?

  11. Photon336
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    oh that sheet I wrote 2) on the side. once you figure out how many moles of reactants you have, you need to multiply each but the molar ratio to figure out which substance is limiting.

  12. Photon336
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    In this case H2SO4 is your limiting reagent and you have 0.255 moles of that

  13. Photon336
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    You need to use your limiting reagent to figure out how many moles of products you have, that's why it's so important, and you must always identity it first.

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

    I see.

  15. Photon336
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    on the paper that's the purpose of step 2. you can clearly see that Aluminum is in excess while H2SO4 is not and all i did was multiply the number of moles of each by the molar ratio as it appears in the balanced equation.

  16. Photon336
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    this will help you to solve part 2 of the question

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

    I got it.

  18. 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.