Question

please be soecific, thank you.

For the following acid base reactions: indicate the correct conjugate bases and acids in the box provided, carefully draw all formal charges and electrons. Finally indicate the direction of the reaction at equilibrium using your knowledge of PKas. C= A= B= A, B or C: Na H3C C: H-C-H + чт A, B or C: H2ce NHy Na H-N-H + Hас-о I-C-H :Z-I +

Answer 1

The questions based on prediction of equilibrium direction can be easily solved by keeping this thing in mind:-Weak acids and bases are lower in energy than strong acids and bases, so acid-base reactions will go to the side with the weakest acids and bases.

This can be illustrated by considering the following examples-

Que. 1 HaC C : Na H3C CH +H- pKa 25 pKa50 Methane has higher pka valuc than propyne Cpka 25), thus the equilibrium wi Lie to the left , in the direction of weaker acid and base. Que. 2 Hас 8:° нзс- б-н H- Na Na н pa 1S pKa 3s Ammonia Cpka a5) has higher pka value than methanol CpKa 1s), thus the equilibrium will lie to the Left, in the direction of weaker add and base.