Which of the following amino acids would be easiest to distinguish from the other three in a titration? A. F - Phenylalanine.
B. K - Lysine.
C. V - Valine.
D. G - Glycine.

B. K - Lysine.

Explanation:

Required

The easiest amino acid to distinguish

The 4 amino acids in the question can be grouped into 2. The groups are:

(1) Group I - Nonpolar amino acids and (2) Group IV - Basic amino acids

Three of the amino acids belong to group I while the last belongs to group IV.

The acids according to their categories are:

(1) Group I - Nonpolar amino acids:- Phenylalanine, Valine and Glycine

(2) Group IV - Basic amino acids:- Lysine

Because Lysine belongs to a different group different from the other three, it will be easily distinguished because it will exhibit a different property from the other three acids.

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.