Question

Preparing a 0.10M NaOH solution

Calculate the number of grams NaOH needed to prepare 250 mL of 0.1M NaOH

solution. Weigh this amount of NaOH in a 50 mL beaker and dissolve with a little

amount of distilled water. Transfer this into a clean and dry 250 mL volumetric flask.

Add distilled water up to the mark and swirl the flask gently to mix thoroughly.

Transfer this solution into a clean and dry plastic bottle. Label it properly and

store it in your locker. This will be used for the experiment on Acid-Base Titration.

Preparing a 0.10M NaOH solution

Grams of NaOH = _______________

Calculation:

Answer 1

$250ml = 0.250litres$

Moles of NaOH $= 0.250× 0.1= 0.0250moles$

Molar Mass of $NaOH =40$

Mass of NaOH $= 40×0.0250=1.0grams$