1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Calculating Mass from Chemical Reaction

  1. Sep 28, 2013 #1
    1. The problem statement, all variables and given/known data
    what is the mass of alum that can be prepared from 1.340g of Al.

    2. Relevant equations
    2Al+2KOH+4H2SO4+22H2O ---> 3H2 + 2KAl(SO4)2 * 12H2O

    3. The attempt at a solution
    given Al is the limiting reagent. Find the moles of Al using n=m/M

    I find Al moles to be 0.049662mol.

    Now multiply this by the molar ratio of 2/2 (which is 1) to find the moles of alum produced.

    now calculate for the mass, m = nM. The molar mass of alum is 474.3g/mol. I find the mass of alum to be 23.55g.

    Am I right?
  2. jcsd
  3. Sep 29, 2013 #2


    User Avatar

    Staff: Mentor

    Looks OK to me.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted

Similar Discussions: Calculating Mass from Chemical Reaction
  1. Chemical Reactions (Replies: 1)

  2. Chemical reactions (Replies: 3)

  3. Chemical Reaction (Replies: 5)