The hydrogen ion concentration of a 10⁻⁸ M HCl aqueous solution at 298 ~K ( ~K _w= . .10⁻¹⁴ ) is:

Step-by-step solution

[ H ⁺ ]=10⁻⁸ M Due to dilute solution. aligned [ H ⁺ ] & =10⁻⁸+10⁻⁷ M & =10⁻⁷[0.1+1] M & =1.1 10⁻⁷ M & =1.1 10⁻⁷ M aligned Caution In an aqueous solution of 10⁻⁸ M HCl , [ H ⁺ ] is based on the concentration of H ⁺ ions of 10⁻⁸ M HCl and the concentration of H ⁺ ions of water.