304molarity - Molarity Glenn V. Lo Department of Physical...

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    Molarity Glenn V. Lo Department of Physical Sciences Nicholls State University
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© G. Lo, M. Janusa, J. Beck, Department of Physical Sciences, Nicholls State University, 2003 Funds provided by La. Board of Regents Distance Education Initiative, Contract# LA-DL-DEI-02/03 Molarity A lot of the experiments we do in  the lab occur in aqueous  solutions.   Solution = homogenous mixture Aqueous means the major  component, or solvent, is water. Solute = other components Molarity (M) or molar  concentration = moles of solute  per Liter of solution Unit: M, mol/L, mol L -1 , mmol/mL,  or mmol mL -1 How many moles on NaCl are  in one liter of solution from  this bottle?  How many  millimoles in one milliliter?
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© G. Lo, M. Janusa, J. Beck, Department of Physical Sciences, Nicholls State University, 2003 Funds provided by La. Board of Regents Distance Education Initiative, Contract# LA-DL-DEI-02/03 Counting Solutes Imagine you have a 0.2M  NaCl solution.  How many  moles of NaCl are in 1 liter of solution? 2 liters of solution? 3 liters of solution? V liters of solution? Moles in V liters of solution =  V times (moles per Liter), or V times Molarity, N = V times M If we use milliliter instead of  Liter, we get millimoles Volume (V) times M Moles (n)
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© G. Lo, M. Janusa, J. Beck, Department of Physical Sciences, Nicholls State University, 2003 Funds provided by La. Board of Regents Distance Education Initiative, Contract# LA-DL-DEI-02/03 Counting Solutes Suppose you have 2.0 L of  0.300M NaCl.  How many  moles of NaCl is in the  solution? How many moles of  cations? How many moles of  anions? 2.0 L  x  0.300mol   =  0.60 mol        1 L    Volume (V) Moles (n) time s M
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Funds provided by La. Board of Regents Distance Education Initiative, Contract# LA-DL-DEI-02/03 Counting Solutes Suppose you have 2.0 L of  0.300M BaCl 2 .  How many  moles of BaCl 2  is in the  solution? How many moles of  cations? How many moles of  anions? 2.0 L  x  0.300mol
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This note was uploaded on 06/11/2009 for the course CHEM 105 taught by Professor Wessel during the Spring '08 term at Nicholls State.

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304molarity - Molarity Glenn V. Lo Department of Physical...

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