1 litre of 0.6 M NaOH and 3 litres 0.4 M Ba(OH)2 are mixed with each other. Hydroxyl ion concentration of the resultant mixture is ----- M
0.45
0.9
0.6
0.75
N = V1N2+V2N2Total volume of the mixture ; N =10.61+30.424 ; N = 0.75 N ; Nbase=OH-