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!

Homework Help: Help on chemistry problem

  1. Sep 9, 2010 #1
    1. The problem statement, all variables and given/known data
    Want to prepare 450.0 mL of a 145 ppm K + ion solution. density of solution is 1.01 g/mL. solution is .728 M in K2SO4. How many mL of the K2SO4 solution need to use?


    2. Relevant equations



    3. The attempt at a solution

    (.728 mol/L K2SO4 )(1.01g/mL)(450.0 mL)

    i dont know what to do next...help?
     
  2. jcsd
  3. Sep 10, 2010 #2

    Borek

    User Avatar

    Staff: Mentor

    This is a simple mass conservation.

    How much potassium will be present in the final solution?

    What volume of the starting solution contains this amount of potassium?
     
    Last edited by a moderator: Aug 13, 2013
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook