- How many moles of HCl will be needed to neutralize 200.0 ml of a 2.5 M NaOH solution?

0.5 mol HCl

Explanation:

2.5 mol/L *0.200 L = 0.5 mol NaOH

                         NaOH + HCl ---> NaCl + H2O

from reaction   1 mol      1 mol

given                 0.5mol    x mol

x= 0.5*1/1= 0.5 mol HCl

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.