PLEASE HELP FAST! WORTH 13 POINTS! A student was titrating a 18.00 mL sample of HCl with Ca(OH)2. To reach the endpoint of the titration and neutralize all of the HCl, the student added 49.62 mL of 0.150 M Ca(OH)2. What was the concentration of hydrochloric acid?

6.4 cm (max) - 25 cm (min)

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.