In a laboratory preparation room one may find a reagent bottle containing 5.0 l of 12 m naoh. write a set of instructions for the production of 250 ml of 3.5 m naoh from such a solution.

The volume taken from the reagent bottle must be 72.91 mL

Explanation:

To calculate the volume of concentrated solution, we use the equation:

where,

are the molarity and volume of the concentrated solution  which is the reagent bottle.

are the molarity and volume of diluted solution which is the solution to be prepared.

We are given:

Putting values in above equation, we get:

Hence, the volume taken from the reagent bottle must be 72.91 mL