Question

Sodium hydroxide is extremely soluble in water. At a certain temperature, a saturated solution contains 573 g NaOH(s) per liter of solution. Calculate the molarity of this saturated NaOH(aq) solution.Concentration: ____________ M

Answer 1

`\text{Molarity (}(mol)/(L))=\text{ }\frac{mass\text{ NaOH (solute)}}{\text{molecular mass NaOH x volume solution (L)}}`

Remember: solution = NaOH + water

Volumen here = 1 L

Molecular mass NaOH = 39.99 g/mol

`M\text{ = }\frac{573\text{ g}}{39.99\text{ }\frac{g}{\text{mol}}x\text{ 1 L}}=\text{ 14.32 }(mol)/(L)`

Answer: Contration = 14.32 M