A buffer solution contains equal concentrations of weak acid and its salt with strong base. Calculate pH of buffer solution if dissociation constant of weak acid is 1.8 10⁻⁵ .

Step-by-step solution

For an acidic buffer, array ll & pH = pK _ a + [ Salt ] [ Acid ] & ( [ Salt ]=[ Acid ]) & pH = pK _ a =- K _ a =- (1.8 10⁻⁵ ) & pH =-[ 1.8-5 10]=4.7447 array