Question

. Calculate the pH of a 0.035 M NaOH solution

Answer 1

Answer:

12.54

Explanation:

The dissociation equation of NaOH is given below:

NaOH <==> Na+ + OH-

Molarity of NaOH = 0.0350M

From the equation,

Since 1M of NaOH produced 1M of OH-, then, 0.035M of NaOH will also produce 0.035M of OH-..

From the above,

[OH-] = 0.035M

Now, we can solve the pH by doing the following:

pOH = — log [OH-]

pOH = — log 0.035

pOH = 1.46

Recall

pH + pOH = 14

pH = 14 — pOH

pH = 14 — 1.46

pH = 12.54