1.

The P^(H) of HCI is 1. The amount of NaOH to be added to 100 ml of such a HCI solution to get p^(H) of 7 is

Answer»

4g
`0.4 ` G
4 mg
`0.4 mg

Solution :To get pH = 7
no. of EQ. . Of BASE = no. of e eq. of acid
pH of HCl = 1 ` [H^(+)= 0.01N , [HCl]= 0.1 N`
From(1) , [NaOH] = 0.1 N
` 0.1 = (W)/( 40 ) xx ( 1000)/(100)THEREFORE W = 0.4 gm `


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