1. APPARATUS
1.1 Calibrated Analytical Balance. : 1 No.
1.2 Volumetric flask (100 ml capacity) : 1 No.
1.3 Beaker (250 ml capacity) : 1 No.
1.4 Glass funnel : 1 No.
1.5 Glass rod : 1 No.
2. REAGENTS
2.1 Sodium Hydroxide Pellets : LR grade
2.2 Distilled water.
3. PREPARATION
3.1 Pour about 75 ml of distilled water into a 250 ml capacity beaker.
3.2 Weigh 20.0 grams of Sodium Hydroxide Pellets LR and transfer slowly, into above said beaker, through it‘s sidewalls, while gentle mixing by using a glass rod.
3.3 Transfer prepared solution into a 100 ml volumetric flask by using a glass funnel.
3.4 Rinse the beaker and funnel with few ml of distilled water, and allow to add into the contents of volumetric flask.
3.5 Make up the volumetric flask to mark with distilled water, remove the funnel, keep the lid to close the volumetric flask and shake gently to mix the solution.
3.6 Transfer the prepared solution into a suitable container and label with all necessary details.
3.7 The resultant solution is having the concentration of 20.0% w/v.
Sodium hydroxide, preparation, distilled water, volumetric flask
