What is the pH of a 0.020 M NaOH solution?Group of answer choices1.4012.6012.301.70

To find the pH of a 0.020 M NaOH solution, we first need to understand that NaOH is a strong base. This means it will dissociate completely in water to form Na+ and OH- ions. The concentration of OH- ions will be equal to the concentration of NaOH, which is 0.020 M.

The pOH of a solution is calculated using the formula pOH = -log[OH-]. Substituting the given concentration into this formula gives us:

pOH = -log(0.020) = 1.70

However, we are asked to find the pH, not the pOH. The pH and pOH of a solution are related by the equation pH + pOH = 14 (at 25 degrees Celsius).

So, to find the pH, we subtract the calculated pOH from 14:

pH = 14 - pOH = 14 - 1.70 = 12.30

So, the pH of a 0.020 M NaOH solution is 12.30.