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March 27, 2017

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What is the molarity of each kind of ion in a solution of magnesium chloride that contains 86.0 g of magnesium chloride dissolved in enough water to make 2.37 L of solution?
M Mg2+
M Cl-

  • chemistry - ,

    mols MgCl2 = grams/molar mass
    M MgCl2 = mols MgCl2/L soln.

    There is 1 mol Mg^2+ in 1 mol MgCl2; therefore, (Mg^2+) = (MgCl2)
    There are 2 mols Cl^- in 1 mol MgCl2; therefore, (Cl^-) = 2 x (MgCl2)

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