Making Way Sodium Hydroxide 1 N
Weigh 40.5 g Sodium Hydroxide p.a (NaOH pro analysis), dissolved in 500 ml of pure water. Pour into a 1000 ml measuring flask. Let cool, then add pure water till 1000 ml.
Note: When the solution is still hot, do not jump plus pure water, due to differences in heat can reduce the accuracy solution concentration.