5. The Ka of acetic acid is 1.7 × 10-5. What is the pKa of acetic acid?
To find the pKa of acetic acid, you can use the formula:
pKa = -log(Ka)
First, plug in the value of Ka for acetic acid:
pKa = -log(1.7 × 10^-5)
Next, use a calculator to find the negative logarithm of 1.7 × 10^-5:
pKa = -log(1.7 × 10^-5)
pKa = -(-4.77)
pKa = 4.77
Therefore, the pKa of acetic acid is 4.77.