What is the molarity of a solution made when water is added to 11 g CaCl2 to make 100 mL of solution?

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Answer 1 · 2014-07-02T00:45:58

Molarity of a solution is defined as number of moles of solute dissolved per liter of solution.

Molarity ( M) = # of moles of solute / volume of solution (L)

Volume of Solution = 100 mL or 0.1 L

moles of Ca $Cl_2$ = mass of Ca $Cl_2$ / molar mass of Ca $Cl_2$

moles of Ca $Cl_2$ = 11g / 111 g $mol^-1$ = 0.099 mol

Molarity ( M) = # of moles of solute / volume of solution (L)

Molarity (M) = 0.099 mol / 0.1 L = 0.99mol/ L