Question

The number of moles of hydroxide (O{{H}^{-}})
ion in 0.3 litre of 0.005 M solution of Ba{{(OH)}_{2}}
is [JIPMER 2001]
A) 0.0050 B) 0.0030 C) 0.0015 D) 0.0075

Answer 1

B should be the correct option
Hope this helps..

Answer 2

Explanation:

Molarity is no of moles of solute/volume of aol in litres

So no of moles of solute is 0.005*0.3=0.0015

As in the solute we have 2OH we hav to multiply 2 with 0.0015 and that gives 0.0030