A chemist prepares a solution of magnesium chloride MgCl2 by measuring out 49.mg of MgCl2 into a 100.mL volumetric flask and filling to the mark with distilled water. Calculate the molarity of Cl−anions in the chemist's solution. Be sure your answer is rounded to the correct number of significant digits.

 Molarity of anions in the chemist's solution is 0.0104 M

Explanation:

Molarity : It is defined as the number of moles of solute present per liter of the solution.

Formula used :

where,

n= moles of solute

= volume of solution in ml = 100 ml

Now put all the given values in the formula of molarity, we get

Therefore, the molarity of solution will be

As 1 mole of gives 2 moles of

Thus  moles of gives =

Thus the molarity of anions in the chemist's solution is 0.0104 M