How many grams of NaOH must be dissolved in one litre of the solution to give it a pH value of 12 ?

Explanation

To find out how many grams of NaOH must be dissolved in one liter of solution to achieve a pH of 12, we can follow these steps:

### Step 1: Understand the relationship between pH and pOH
The pH scale ranges from 0 to 14. The relationship between pH and pOH is given by the equation:
\[ \text{pH} + \text{pOH} = 14 \]
Given that the pH is 12, we can find the pOH:
\[ \text{pOH} = 14 - \text{pH} = 14 - 12 = 2 \]

...