chemistry question

Question

Sodium hydroxide is extremely soluble in water. At a certain temperature, a saturated solution contains 563 g NaOH(s) per liter of solution. Calculate the molarity of this saturated NaOH(aq) solution.

Answer 1

Molarity (M, or mol/L) is defined as moles of solute per liter of solution. Our solute in this case is NaOH, so we only need to convert grams of NaOH to moles of NaOH using its molar mass (39.997 g/mol):

563 g NaOH/1 L solution * 1 mol NaOH/39.997 g NaOH = 14.1 mol NaOH/1 L solution = 14.1 M NaOH