Homework Answers
Here 10.7 g of MgCl2 dissolved in 4.0 L of H2O means that MgCl2 in in less amount so it is solute and H20 is solvent
Now, molar mass of MgCl2 = 24 + 35.5×2 = 95g/mol
Moles of MgCl2 = mass /molar mass => 10.7/95 =>0.113 mol
Molarity = moles/Volume of solvent in L
= 0.113/4 => 0.028 M
So concentration of solution is 0.028 Molar.
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