What is the ph of a 0.006 m koh solution? 1. 11.78 2. 7.00 3. 2.22 4. 8.88 5. 5.12?

The concentration of OH⁻ is first converted to pOH bu using followinf formula,

pOH = - log [OH⁻]

Putting value,

pOH = - log (0.006)

pOH = 2.221

As we know,

pH + pOH = 14

Solving for pH,

pH = 14 - pOH

Putting value of pOH,

pH = 14 - 2.221

pH = 11.779

Result:

Option-1 is the correct answer.