First slide

Concentration methods

Question

100 ml of ‘X’ M Phosphorous acid completely neutralizes 300 ml of 4 M KOH solution. The value of ‘X’ is

Moderate

A

6
B

3
C

9
D

12

Solution

$V_{a} N_{a} = V_{b} N_{b} 100 (M) 2 = 300 (4) 1; M = 6 M;$

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