Question

please answer all parts of this question and explain everything

5. Using HSAB theory, choose the better acid or base in the following pairs and explain your choice: a. CH3NH2 or NH3 in reaction with H b. Which end of SCN will coordinate to Cr"; Pt?? c. Boric acid, B(OH)3, acts as an acid in water, but does not do so via ionization of a proton. Rather, it serves as a Lewis acid towards OH. Explain with the use of a balanced equation.

Answer 1

an d NH3 both are CH3NH2 hard 2a22 paase, and Ht is a streng cicdl. NOw, NH2 is shOnger ase or arder bave than C H3 NH S hard- 1ard ombinahon is favorable, SC NH reatk with Ht 2as soft side& hard t1e s sidle is soft se it bonds wlth Ptt which is a Sott acid. With Ca3+ which is hard acid the Nside of SCN atachess which will form hard-hardl ombination. sCN side C Baocaid in water, BCOH 2 H,0 BCOH+ H N, 8407 +2 H20 Hy 84 07 +2NaOH js hard base so B(OH get Bor acel accepts Si4ce OHT alteched to it, so Leuois acel OH to be act a