Interactions of Powder/ Identifying White Powders

Today we combined liquids and white powders! The liquids we used were Vinegar, DI H2O, and Iodine. The Powders we used consisted of Baking Soda, Corn Starch, and Baking Powder. We combined Corn starch with Iodine, then with Baking Powder, and also with Baking soda. We combined Vinegar and DI H2O also with all the powders. In which all were seperated. My partner and I were able to distinguish the Powders by looking at them and seeing how they reacted. For example, Iodine and Corn Starch changed colors and so did Iodine and Baking powder and also, Iodine and Baking Soda. Vinegar and Baking Powder bubbled, as did Vinegar and Baking Soda, and DI H2O also bubbled when it was mixed with Baking Soda and also, Baking Powder. DI H2O and Cornstarch Dissolved as well as Vinegar and Cornstarch. We were given results that would allow us to identify a unknown powder, in which we did! We noticed that the powder bubbled with DI H2O and Vinegar and also changed colors when we added iodine, so the powder must've been Baking Soda! It was a fun and interesting lab!!