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Super Quick mEq question if you can, please

Discussion in 'Pharmacy Licensure and Exams' started by shaq786, Aug 17, 2011.

  1. shaq786

    shaq786 Senior Member
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    The molecular weight of MgCl2 is 95.211

    So we know that in 95.211 mg of compound, there are 2 mEq of Mg2+

    In 95.211 mg, how many mEq of Chloride are there?

    Is the answer 2 mEq because there are two molecules of Chloride?
     
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  3. poda521

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    I believe the answer is 1 mEq. Chloride is monovalent and the charge is -1.

    So in 95.11mg of MgCl there would be 1 mEq of Cl.
     
  4. Bkobe7

    Bkobe7 New Member
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    Look at total cation or anion charge. Then take the absolute value.

    1 mmol of MgCl2 yields 2 mEq of Mg2+ because the total cation charge is +2
    1 mmol of MgCl2 yields 2 mEq of Cl- because the total anion charge is 2 x (-1) = -2
     

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