Suppose in an experiment to determine the amount of sodium hypochlorite in bleach, 0.0000157 mol K I O 3 were titrated with an unknown solution of N a 2 S 2 O 3 and the endpoint was reached after 17.64 mL . What is the concentration of the N a 2 S 2 O 3, in M?

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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.