Tuesday, February 22, 2011

Natalie- Tuesday, 2/22



1) We picked up one sheet: ChemThink Precipitate Lab

2) We went over lab quiz we took on friday
  • Molarity= unit of concentration
  • Use formula to determine how many mols of solute needed to make 0.15 M of solution
  • If you need help with the formula use this video as a reference: http://www.youtube.com/watch?v=8oTqwBAvbnY&feature=fvwrel

  • .015 mol NaCl

    58.44g NaCl

    1 mol NaCl


  • Fill beaker with 50 mL of water
  • Then mix in .88g of Solute (NaCl)
  • Then fill rest of the beaker to 100 mL
3) Went through IV. Solubility Notes
  • Soluble in water= dissolves in water (aqueous)
  • In soluble= does not dissolve in water (solid)
  • There are some exceptions though, mentioned on the sheet
4) Went through V. Solubility Practice #1-3:
  • If the balanced equation has aqueous on both sides, then no reaction has taken place
5) Homework are questions #1 and #2 on the ChemThink precipitate lab sheet we picked up in
class. Use www.chemthink.com to answer the questions under Solubility





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