Question

6. (4 pts. total; 2 pts, each) For each of the following questions, circle the BEST answer. a. Strongest Bronsted-Lowry acid HF HCI HBr b. Has the lowest pka CH4 NH3 H2O 7. (4 pts total, 2 pts each) For each of the following molecular structures, circle the MOST acidic hydrogen. Note that lone pairs have been omitted for clarity. HH нннн NA b. H HH a. Hн 8. (4 pts. total; 2 pts. each) In the space provided below, explain the following atomic properties. Be succinct.

Answer 1

Bronsted-Lowry And Those species which donates Ht in solution. (ta I stronger the bond between 'H' and Electronegative Element Halogen), more difficult for Hydrogen halide to loose it in Solution. HI Ras most weak H-I bond. It will I loose Ht in easily. - More Stabilization of Conjugate base (Halide ion), More will be strength of Bronsted - Loway acid. H-Itag Htcaq + I (aq H-lags FHt cap & Flag - Ht lag ti caq H-Brilag, F + caps & Brlag → out of all halide ione, I is ost stabilized because of its largat size: HI - strongest Bronsted - Lowry Acid ! [m Higher the pko of aud, weakes the acidic strengi Pra & Acidic strength - Its Pka hishat NH₃ acts HS P 40 2 NH₃ + as base. It gives -OH ion in Solution. Hraq) + 45 (99) H+ (aq) + Ho (99) HO NHA OH lag

Hos is most acidic. The conjugate base H5 formed is more stabilized as compared to Ho. The negative change is stabilized more because of larger size of 's! CH4 is non-polar molecule. It is neither acidic non basic Hs has lowest pka 19) - Most Acidic Hydrogen Along a period the stabilization of Negative charge is done more effectively by more electronegative element A oxygen is more elects e than 'N' - Electronegativity will dominate over size acnou Period for deciding acidic / Basic Propertie. rg H H M H H T H Most Acidic Hydrogen Across a group size will dominate over electronegativity. The stabilization of negative charge will be more Effective by Sulphun atom because of lurser size.