Homework Help Forum: Chem

Posted by L on Friday, November 6, 2009 at 4:11pm.

How many moles of ions are released when this sample is dissolved in water? 3.55*10^18 formula units of Ba(OH)2*8H2O? So far I know to divide this by avogadro's number (/6.022*10^23) which equals .590*10^-5 mol. Don't know what to do from here. Please help!

• Chem - bobpursley, Friday, November 6, 2009 at 4:17pm

  Ok, then for each of those formula units, you get one barium+2 and two hydroxide-1 ions, or three ions for each formula unit. Multilply your answer by 3

  
  

• Chem - L, Friday, November 6, 2009 at 4:25pm

  Ok, so 1.77*10^-5 mol ions?

  
  

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