Question

Find the pH value of n/10 NaOH solution

Answer 1

[OH-] = Normality = 0.1

pOH = -log[OH-]
= -log(0.1)
= 1

pH = 14 - pOH
= 14 - 1
= 13

pH of N/10 NaOH solution is 13

Answer 2

pH of 0.1 NaOH solution is 13

Explanation:

To find the pH of NaOH, we first need to know the molarity of NaOH. We consider that the solution is 0.0 NaOH strong which means that the molarity is 0.1 or there are 0.1 mol/l of OH ions.

To calculate the pOH we take log of 0.1

$pOH=-log[0.1]=1$

We also know that,

pH + pOH = 14

So, we get pH=13

Now we know that the pH of NaOH = 13

Now, n/10 refers to the normality of the solution of NaOH. Normality is the concentration of the solution. So, we can write it as 0.1 N

We also know that normality equals the number of moles per liter of a solution. We already stated that the number of moles = 0.1