What is the product of (structural formula):
methyl acrylate ch2=chcooch3 with hcl
methyl acrylate with h2/pt

Structural formula of reactions is in the picture

Explanation:

The reaction of a alkene with HCl is called "alkene hydrohalogenation". The alkene "attacks" hydrogen. The hydrogen occurs following Markovnikov rule:

" Hydrogen takes place at the less substituted carbon atom of the double bond".

Then, Cl⁻ attacks the other position of the initial double bond giving as result the blue structure,

The second reaction is the alkene hydrogenation that gives as result the respective alkane (Red structure).

I hope it helps!

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.