Notices
Results 1 to 2 of 2

Thread: Little question

  1. #1 Little question 
    Forum Freshman
    Join Date
    Sep 2006
    Location
    malaysia
    Posts
    15
    can anyone help me?thx..4.0g of solid magnesium hydroxide is added to 50cm^3 of 1.5 mol dm-3 nitric acid.the mixture is stirred until no furhter change.calculate the mass os solid magnesium hydroxide left unreacted at the end of the reaction.
    (RMM:H,1 ;O,16 ; Mg,24


    Reply With Quote  
     

  2.  
     

  3. #2  
    Forum Freshman César's Avatar
    Join Date
    Sep 2006
    Location
    Spain, Europe
    Posts
    61
    1. Write down the formulas for magnesium hydroxide and nitric acid.
    2. Write down the reaction taking place.
    3. Balance it.
    4. Calculate the number of moles in the solid magnesium hydroxide.
    5. Calculate the number of moles in the nitric acid solution.
    6. According to the balanced reaction calculate number of moles that did not react.
    7. Transform this number of moles into weight.
    8. Be careful with units!

    Best regards,

    César


    Reply With Quote  
     

Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •