Question

Calculate the H± ion concentration in 0.10 M acetic acid solution. Given that the dissociation constant of acetic acid in water is 1.8 x 10-6.

Answer 1

★$\color{darkblue}\underline{\underline{\sf Given-}}$

• Concentration of acetic acid = 0.10M
• Dissociation constant of acetic acid ${\sf (\alpha)=1.8×10^{-6}}$

★$\color{darkblue}\underline{\underline{\sf To \: Find-}}$

• Concentration of ${\sf H^+\:ion}$

★$\color{darkblue}\underline{\underline{\sf Formula \: Used-}}$

$\large\color{violet}\bullet\underline{\boxed{\sf [H^+]=C\alpha}}$

★$\color{darkblue}\underline{\underline{\sf Solution-}}$

$\implies{\sf [H^+]=0.10×1.8×10^{-6}}$

$\implies{\sf [H^+]=0.18×10^{-6}}$

$\color{red}\implies{\sf [H^+]=18×10^{-4} }$

★$\color{darkblue}\underline{\underline{\sf Answer-}}$

★Concentration of ${\sf H^+}$ ion is $\color{red}{\sf 18×10^{-4}}$