Question

CHM 202F19 HW 9B Name Answer the Q. in the spaces below. Use the back of the page if necessary. 1. Give the conjugate bases for the following Bronsted-Lowry acids: a) H2SO4 b) HNO3 c) H20 d) OH e) H3PO. Ans. a) 2. Give the conjugate acids for the following Bronsted-Lowry bases: a) CO32 b) HPO 2 c) H2PO. d)NH2 e) NH3 Ans. a) b) _ 3. Calculate the pH of a 0.025 M solution of barium hydroxide. 4. Show how formic acid, HCOOH, dissociates in aqueous solution and calculate the pH of a 0.25 M solution. Ky = 1.8 x 10-4

Answer 1

0 (a) usoa. 6 Nos ☺ on @ 0² © Halog conjugate base is formed by donating * (a) recož 6 H₂por 0 H3PO4 @ NH3 @ what consugete acid is formed by accepting tt BaoH) Bart+200 6 - perea tog [on] =-log(0.05) = 1.3 2x0.025 = 0.05 pr - 14- pon a 14-119 = 12.7 Hoon 8.25 x ĉ Hoo & HA tn tn c. E 0-25-n racool [urt (0.25-4) - 1.8x10t Ka is small someb.5 som 15610 *= 6-7616 pro log Cht) = -log(8.74153) = 2.17 [PH2 2.17