Question

Calculating the expected pH of the buffer solution: Given that the pKa for Acetic Acid is 4.77, calculate the expected pH of the buffer solutions using the Henderson-Hasselbalch equation and the concentrations of Acetic Acid and Acetate added to the 250 ml Erlenmeyer flask: pH

Answer 1

`pH=4.77`

Step-by-step explanation:

From the question we are told that:

pKa for Acetic Acid
`pK_a= 4.77`

Therefore

For Equal Concentration of acetic acid and acetatic ion

`CH_3COOH=CH_3COO^-`

Generally the Henderson's equation for pH value is mathematically given by

`pH=pK_a+log(base)/(acid)`

`pH=4.77+log(CH_3COO^-)/(CH_3COOH)`

`pH=4.77+log1`

`pH=4.77`