First slide
Concentration methods
Question

Equal volumes of 0.2 M NaOH and 0.2 M Ba(OH)2 are mixed with each other.  Hydroxyl ion concentration of the resultant mixture is ----- M

Moderate
Solution

N = V1N2+V2N2Total volume of the mixture ; N =10.21+10.222 ; N = 0.3 N ; Nbase=OH-

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