no reaction will occur.

Reason: Alum solution is potassium aluminum sulfate dodecahydrate, which is an aluminum salt and will not react with aluminum products.

Potassium aluminum sulfate dodecahydrate, also known as alum, alum, potassium alum, potassium aluminum alum and potassium alum, is a double salt of potassium sulfate and aluminum sulfate containing crystal water. Colorless cubic crystals are usually octahedral in appearance, or form a poly shape with cubes and rhombic dodecahedrons, and sometimes they are attached to the container wall with {111} faces and look like hexagonal plates. They belong to α-alum double salts and have glass luster. The density is 1.757g/cm3, and the melting point is 92.5℃. At 92.5℃, 9 molecules of crystal water are lost, and at 2℃, 12 molecules of crystal water are lost, which are soluble in water and insoluble in ethanol. Alum tastes sour, cold and toxic. Therefore, it has antibacterial and astringent effects and can be used as traditional Chinese medicine. Alum can also be used to prepare aluminum salts, baking powder, paints, tanning materials, clarifiers, mordants, papermaking, waterproofing agents, etc., and can also be used as food additives. In our life, it is often used for purifying water and as an edible expansion agent, such as fried sesame balls and fried dough sticks.

It is forbidden

that aluminum-containing food additives may be used in the processing of fried dough sticks, steamed bread, noodles, puffed food and other foods. Long-term consumption will do great harm to human body, especially to children's growth and intelligence.

The National Health and Family Planning Commission and other five departments have stipulated that from July 1, 214, flour products such as steamed bread and baked cakes (except fried flour products, batter for hanging paste, powder wrapping and frying powder) cannot be added with aluminum-containing leavening agents such as potassium aluminum sulfate and ammonium aluminum sulfate, commonly known as "alum", and the main components of compound leavening agents (namely baking powder) are also the above two substances. In puffed food, any aluminum-containing food additives are no longer allowed.