1 It is aluminum potassium sulfate. 2  This is the type of alum that you find in the grocery store for pickling and in baking powder. 3  It is also used in leather tanning, as a flocculant in water purification, as an ingredient in aftershave and as a treatment to fireproof textiles. 4  It's chemical formula is KAl(SO 4) 2. It is also used in leather tanning, as a flocculant in water purification, as an ingredient in aftershave and as a treatment to fireproof textiles. 2  It's chemical formula is KAl(SO 4) 2. 3  Soda Alum. 4  Soda alum has the formula NaAl(SO 4) 2 Â·12H 2 O. It is used in baking powder and as an acidulent in food.
Fruits and Vegetables. The Aztec people grew a variety of fruits and vegetables, which provided them with key vitamins and minerals that they needed to support their active lives and their good health. Among the most prominent fruits and vegetables were chili peppers, sweet potatoes, tomatoes, onions and avocados.
The Maya, Aztec, and Inca civilizations ate simple food. Corn (maize) was the central food in their diet, along with vegetables such as beans and squash. Potatoes and a tiny grain called quinoa were commonly grown by the Incas. Avocados and tomatoes were mainly eaten by the Aztecs and Maya, along with a wide variety of fruit. Corn was made into a kind of porridge, called atole in Mesoamerica (the region of Mexico and Central America once occupied by the Maya, Aztecs, and related cultures) and capia in Inca territory.