Question

Chem 1030 Chapter 16 Chemistry of Acids and Bases 4. Predict the stronger acid in each pair and explain why. a) H3P or HAs b) H3P or HS c) H2SeO4 or H2Se03 d) HOCN or HCN (In HOCN, the H ion is attached to the O atom of the OCN ion.) 5. The conjugate bases for the acids F3CCOOH and H;CCOOH are shown.:03.0: 0 0 : a) Which conjugate base is stronger, i.e. which is more readily accept a proton? Why? f-C-F: ...-O-: H-C-H b) Which acid is be stronger, i.e. which is more readily donate a proton? Why? 6. a) Given the following Lewis structures for the following molecules: PH3, H2S, and BH3, which can function as a Lewis base? Which can function as a Lewis acid? H-P- H S . H H-B-H н н— В- Н H b) Write the structure for a Lewis acid-base adduct involving two of the above compounds.

Answer 1

PAGE No. POENO DATE 4) 5) 2) → -> CH3COO C conjugate base) is a shonger than FCCOO C conjugale base) because electron density of atom in F30000 via induction, and become o withdraw by stable 50 CH3COo" readily accept a proton H₃P or Hats H₃As is more stronger acid than H₂P because when we go down the group acidic strenght increases because bond strenght decreases as a size of element increases it is easy to donate a proton. 6) → Hap or H₂S Hy is more stronger acid than Hap because more electronegative atom than P. electronegativity = Shonger Acid F CCOOH is strong acid than CH3COOH because indychon effect is present in F3 CCOOH is stablies conjugate base of F3COOH , therefore wearer the Conjugate base more Acidic the Acid. is the c) 3 H₂Se 04 or H₂5e03 Hyse is a stronger Acid Han Hyses because It is easy to release H her greater number of oxygen atoms are attached to a central non-metallic element = d) HOCH or HEN HOCN is shonger acid than HCN because Halom PHä . Act as a lewis acid that accept the epair but also act as lewis base because pho have a single lone pair to donate. BH - It act as a lewis Acid because of its incomplete Octet , which accept e pair. Has - Generally act as a rewic Acid because it accepting a é pair to form the o-H bond. Also act as lewis Base because it have t.30 tone pair to donate. is atached to a more electronegative arom ни HA N-4 + B-H - -N-B-n (Lewis Rase) (Lewis Acid) { lewis Acid-Base Adduct) ня 1 H- P-4 B-1 In-P-B-n (Lewis Base) Lewis Acid) Adduct Clewis Acid - Base)