Question

7. According to Bronsted-Lowry theory, a base is defined as a a) substance containing OH ions. b) proton donor. c) electron pair donor. d) electron pair acceptor. e) proton acceptor. 8. According to the Lewis theory, a base: a) is a proton acceptor. b) is a proton donor. c) makes available a share in a pair of non-bonding electrons. d) is any compound that contains electron pairs c) accepts a share in a pair of electrons. 9. Predict whether each of the following salt solutions is expected to be neutral, acid, or basic: (c) KI (a) NHeCIO (b) NaF (e) Na CO (d) NH4NO ions in a solution in which pH 4.32? 10. What is the concentration of H,O 11. Calculate the pH of a solution in which (OH]-2.50 x 10 M)

Answer 1

7) (a) According to bronsted lowry concept, a base is a substance that contain OH- ions.

8) (d) According to lewis theory, a base is any compound that contain electron pairs.

9) a) Nhy clou +HOT WHOH + cont audic Solution u) Mot + H₂O alattf+40 (eleutral Solution) KI + H₂O kt & I & H₂O . ( Neutral Solution) (c) NHY OH + aloz ) d) allly No & HO - acidic Solution 6) also com totho - Dalat + Holoz (200) Basic Solution pH = 4.32 Ha a log + 7 = 4:32 4.32 4. 8 X10 log (4+] = -4.32 14+1 = 1 11) [4] = 25X10 IM ug (2.5X104) = -log 25 +4 bot- - pou = 3.6 pkw = pH + poh pH a pou + pkw 214-3:6 = 10.39 (pH = 10.39 1#