First slide

Concentration methods

Question

80 ml of 5 M Phosphoric acid completely neutralizes 80 ml of ‘X’ M Magnesium hydroxide solution. The value of ‘X’ is

Moderate

A

2.5
B

7.5
C

3.33
D

2.66

Solution

$V_{a} N_{a} = V_{b} N_{b} 80 (5) 3 = 80 (M) 2; M = 7.5 M;$

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