There is about 1.0 g of calcium as ca2+ in 1.0 l of milk. what is the molarity of ca2+ in milk?

Explanation:

It is known that molarity is the number of moles present in a liter of solution.

           Molarity =

Also, number of moles equal mass divided by molar mass. And, molar mass of calcium is 40.07 g/mol.

               No. of moles =

                                     =

                                     = 0.025 mol

Therefore, calculate the molarity as follows.

             Molarity =

                            =  

                            = 0.025 M

Thus, we can conclude that molarity of in milk is 0.025 M.