Answer:
Explanation:
John knew his hypothesis was incorrect because he was left with the exact some compounds as he had started with. Something is only a chemical reaction if it changes the actual chemical structure and/or identity of a reactant. In this case, John mistook a physical change for a chemical change. The salt changes forms from solid to aqueous (dissolved in water), but did not change on a molecular level. Also, no new products were produced in the reaction and it did not show any of the 5 indicators of chemical reactions (temperature, colour and/or odour changes, formation of precipitate, production of a gas)
Hope this helped!
