Which aqueous ion gives a white precipitate with aqueous sodium hydroxide and with aqueous ammonia? a. Cu^2+
b. Fe^2+
c. Fe^3+
d. Zn^2+

Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.