Read the following chemical equation. Cl2 (g) + K+ Br− → K+ Cl− + Br2 (g)

What most likely happens during this reaction?

Potassium loses an electron.
Potassium gains an electron.
Bromine loses an electron.
Bromine gains an electron.

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.