Question

what is the molarity of a solution made when water is added to 11 g cacl2 to make 100ml of solution​

Answer 1

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

C

l

2

= mass of Ca

C

l

2

/ molar mass of Ca

C

l

2

moles of Ca

C

l

2

= 11g / 111 g

m

o

l

−

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