Question

Moles n solution: Calculate the molarity of a solution of NaOH made by dissolving 2moles of sodium hydroxide in water and making up to 250cm^3?

Answer 1

`"8 M"`

Explanation:

`"Molarity" = "Moles of solute"/"Volume of solution (in litres)"`

`color(white)("Molarity") = "2 mol"/(250 cancel("cm"^3) × "1 L"/(1000 cancel("cm"^3))`

`color(white)("Molarity") = 2000/250\ "mol"/"L"`

`color(white)("Molarity") =\ "8 M"`