The reaction that joins two monomers to form a polymer is known as a reaction. the molecule of water formed is due to the interaction between and a hydrogen ion

Answers:

             (i)  The reaction that joins two monomers to form a polymer is known as a dehydration reaction.

            (ii)  The molecule of water formed is due to the interaction between Hydroxide ion and a hydrogen ion.

Explanation:

              (i)  Dehydration means the removal / elimination of water molecules in a particular reactions. For example, when amino acids are reacted they form a polypeptide chain with the elimination of water molecules. Such reactions are also called as condensation reactions.

            n H₂N-RHC-COOH    →   H₂N-[RHC-CO-NH-RHC]n-COOH  +  n H₂O

              (ii)  Water molecule has a chemical formula of H₂O. In statement we are given with hydrogen ion (i.e. H⁺) So, we are in need of the counter part which is OH, also the OH should contain a negative charge i.e. OH⁻. Hence, OH⁻ (Hydroxide Ion) will react with H⁺ to form water i.e.

                                              OH⁻  +  H⁺    →    H₂O

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.