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11 March, 00:51

How many grams of magnesium chloride are needed to make 700ml of a 1.4 m solution?

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  1. 11 March, 01:16
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    Molarity is defined as the number of moles of solute in 1 L solution

    molarity of MgCl₂ solution to be prepared - 1.4 M

    volume of the solution to be prepared - 700 mL

    the number of moles of MgCl₂ in 1 L - 1.4 M

    therefore 700 mL should contain - 1.4 mol/L x 0.700 L = 0.98 mol

    molar mass of MgCl₂ - 95.2 g/mol

    mass of MgCl₂ required - 0.98 mol x 95.2 g/mol = 93.3 g

    mass of MgCl₂ required is 93.3 g
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