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

Options

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

Answer

A

Explanation

For HCl
M = N = 0.1
`N_1 V_1 = N_2V_2 , 25 xxN_1 = 0.1 xx 35`
`N_1 = (0.1xx35)/25 , :.M = (0.1xx35)/(25xx2) = 0.07`.