Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

nellysmith

Does anybody know please how to calculate the percent water of KAl(SO4)2•12 H2O?

  • 2 years ago
  • 2 years ago

  • This Question is Closed
  1. JFraser
    Best Response
    You've already chosen the best response.
    Medals 2

    the formula of the hydrate tells us that 1 unit of alum (the salt) will be surrounded by 12 water molecules. This ratio is constant, so a MOLE of alum will have 12 MOLES of water surrounding it. The molar masses of these pieces are easy to find. The % water is calculated by:\[\%H{_2}O = \frac{MM (H{_2}O)}{MM(hydrate)} * 100\%\] I get about 54.4% water

    • 2 years ago
  2. nellysmith
    Best Response
    You've already chosen the best response.
    Medals 0

    Thank you so much JFraser.

    • 2 years ago
    • Attachments:

See more questions >>>

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.