Name a salt which does not contain water of crystallisation

2. how is heavy water different from normal water

How do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?

Which statement is true about a catalyst? a: a catalyst decreases the rate of the reaction. b. a catalyst is consumed during a chemical reaction. c. a catalyst lowers the activation energy of a reaction. d. a catalyst increases the reactant concentration during a reaction.