1. what is the balanced chemical equation for the reaction that takes place between bromine and sodium iodine? a. br2 + nai -> nabr2 + i b. br2 + 2nai -> 2nabr + i2 c. br + nai2 -> nabri2 d. br +nai2 -> nabr + i2 2. which fact is the most important indicator that the following reaction will take place? ni(no3)2(aq) + k2s(aq) -> nis(s) + 2kno3(aq) a. the reaction is a double displacement b. a precipitate is formed c. the reactants are ionic compounds d. the products are ionic compounds