25 mL of a solution of barium hydroxide on titration with a 0.1 molar solution of hydrochloric acid gave a titre value of 35 mL. The molarity of barium hydroxide solutions was

Options

A. 0.07
B. 0.14
C. 0.28
D. 0.35

Answer

A

Explanation

`Ba(OH)_(2)+2HCI rarr BaCI_(2) +2H_(2)O`
`(M_(1)V_(1))/(n_(1)) = (M_(2)V_(2))/(n_(2))`
`[Ba(OH)_(2)]" "[HCI]`
`(M_(1) xx 25)/(1) = (0.1 xx 35)/(2)`
`M_(1) = (0.1 xx 35)/(2 xx 25) = 0.07M`