What would happen to the side chains of these amino acids if the pH were to change from 7.40 to 2.00. Classify each amino acid according to whether its side chain would be predominantly protonated or deprotonated at a pH of 2.00. Recall that the pKa values of the Asp, His, and Lys side chains are 3.65, 6.00, and 10.53,3.65, 6.00, and 10.53, respectively. Amino Acids:
Lys, His, Asp

The gas would begin to expand, and eventually the can would burst or explode.

According to arrhenius theory of acid and bases, an acid is a proton donor, while base donates hydroxyl ions. further, acid and base reacts to form salt and water.consider following example.hcl    +      h2o          →      cl-          +      h3o+here, hcl has donated a proton, hence it is an acid.now consider following reactionhcl      +      naoh            ↔      nacl      +        h2oin this reaction, hcl donates proton, hence it is acid. on other hand, naoh donates hydroxyl ion (i.e. hence it is a base.