# Super Quick mEq question if you can, please

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

1. ### shaq786 Senior Member 7+ Year 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?

2. ### 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.

3. ### Bkobe7 New Member 7+ Year 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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