Question

Please answer these multiple choice questions for me! I need the help big time!

Question1 Using the pKa values from the table in your textbook, determine which side of the equilibrium is favored. CH3OH(CH3)3N this is not an equilibrium reaction, so no reactants are left O both sides of the equation are equally favored reactants side O products side

Answer 1

QUESTION Acids are the chemical species that are capable of donating proton (H, hydrogen ion) by dissociation A strong acid completely dissociates, whereas a weak acid partially dissociates in a solution The acid dissociation constant or the acid-ionization constant, refers to the extent of ionization of weak acids. It is the quantitative measure of the strength of a weak acidic species in a solution. It is also the equilibrium constant of a reaction and is denoted by Ka For the dissociation of a given monoprotic acid, the equilibrium constant Ka is given by HA A H H* A HA a Therefore, the greater the value of Ka, greater is the acidic strength of the given acid.

Since, the negative logarithm ofthe acid dissociation constant or the Ka value is pKu pKa log K ...equation 1 By equation 1. K and pKa are inversely proportional to each other. Therefore, for a strong acid, the value of the acid dissociation constant, K4 is high and pK is low. Whereas, for a weak acid, the value of the acid dissociation constant, Ka is low and pK4 is high Given chemical reaction: CH3O +(CH2) NH CH3OH (CH)N The equilibrium constant or the acid dissociation constant for the given acids methanol and trimethylamonium ion in the given chemical reaction are (CH3)NH(CH2)3N + H [(сH), N I| Ka Н* (CH) NH CH3O + H* CH3OH CH2O H К. [сн,он] н*

The pKa values of the given acids methanol and trimethylamonium ion in the given chemical reaction are 15.5 and 9.8, respectively Since, the pKa value of trimethylamonium ion (9.8) is smaller than the pK value of methanol (15.5) Thus the value of the acid dissociation constant (K) of trimethylamonium ion is greater than that of methanol Therefore, trimethylamonium ion is a stronger acid than methanol and thus can dissociate more readily to give the conjugate base trimethylamine Therefore, the equilibrium will favor the products side The correct option is: products side