Question

What volume of a 6M sodium hydroxide solution will give you 20g of
sodium hydroxide?

Answer 1

Answer:

Volume of a 6 M sodium hydroxide solution with 20 g sodium hydroxide will be 0.083 litres.

Explanation:

Molarity = Number of moles of solute÷volume of solution in litres

Given molarity = 6 M

Number of moles = given mass÷molar mass

Given mass = 20 g

Molar mass of NaOH = (1×23) + (1×16) + (1×1)

                                   = 40 g/mol

Number of moles = $\frac{20}{40}$

                             = 0.5 moles

Molarity = Number of moles of solute÷volume of solution in litres

6 = 0.5 ÷ V

V = $\frac{0.5}{6}$

   = 0.083 litres.