Question

Calculate the new molarity that results when 250 mL of water is added to each of the following solutions? a. 125 mL of 0.251 M HCl

Answer 1

`1/12\ "M"`

Explanation:

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

Initial moles of solute is

`"n = 0.251 M × 0.125 L = 0.03125 mol"`

New volume of solution `"= 125 mL + 250 mL = 375 mL = 0.375 L"`

New Molarity is

`"Molarity" = "0.03125 mol"/"0.375 L" = color(Green)(1/12\ "M")`