12.0 g NaHSO4 is dissolved in water to make a 2.00 L solution.
What is the molarity of the M

0.05M or 0.05moldm⁻³

Explanation:

Mass of NaHSO₄  = 12g

Volume of water  = 2L

Unknown:

Molarity of the solution  = ?

Solution:

The molarity of a solution is the amount of moles of solute dissolved in a given volume of solvent.

Mathematically;

                Molarity  =

   Let us find the number of moles of NaHSO₄;

            Number of moles  =

                molar mass of NaHSO₄ = 23 + 1 + 32 + 4(16) = 120g/mol

          Number of moles of NaHSO₄ =  = 0.1mole

Now;

            Molarity  =   = 0.05M or 0.05moldm⁻³