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A 4.691 g sample of MgCl2 is dissolved in enough water to give 750. mL of solution. What is the magnesium ion concentration in this solution?

  • chemistry -

    Convert 4.691 g MgCl2 to moles. moles = grams/molar mass.
    There is 1 Mg ion/molecule MgCl2; therefore, moles Mg = moles MgCl2.
    M Mg ion = moles/L = moles from above/0.750 = ??

  • chemistry -

    6.52x10^-2

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