What volume of water should be added to 50ml of N/2 NaOH to make it exactly decinormal?
solution:
volume v1= 50ml
concentration n1= 0.5N
volume v2=?
concentration n2=o.1N
Now we have
molar equivalent of seminormal solution= molar equivalent of deci normal solution
or, 0.5* 50= 0.1*v
or, 250= v
Thus, volume of water should be added=250-50 ...