Student a weighs 0.747 g of khp on a laboratory balance. the khp was titrated with an unknown naoh solution and the concentration of the naoh determined to be 0.113 m. student b diluted 6 m hcl from the reagent shelf using a volumetric flask to obtain 0.6 m hcl. this solution was titrated with the same unknown naoh solution and found to be 0.104 m. which student should have the more accurate concentration for the unknown naoh? why?

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.