Question

how to prepare 250ml of M/10 sodium hydroxide NaOH solution?
anyone tell... its urgent

Answer 1

i used to do experiments during my master. I used the weight measurement to make the solution. Let's say for 1l solution i.e. 1000ml. If you Want to make a 10% solution. Add 100 g  of NaOH to 900ml (=900g) of water (De ionized). That will give you a 10% NaOH solution. 

Answer 2

Answer:

To make 1 M NaOH solution, you have to dissolve 40.00 g of sodium hydroxide pellets in 250 mL distilled water and then make up the solution to 1 liter. Weigh 19.95 gm of NaOH pellets & dissolve them in half liter(500ml) of distilled water water, what you will be having now is 1M NaOH solution.

Explanation:

If you Want to make a 10% solution. Add 100 g of NaOH to 900ml (=900g) of water (De ionized). That will give you a 10% NaOH solution.