Is alumina soluble in aluminium sulphate solution or magnesium sulphate solution? Troublesome master

No. Alumina can only be dissolved in a strong acidic solution, so magnesium sulfate cannot; If it is dissolved in aluminum sulfate, it is equivalent to no reaction, because at the same time of dissolution, there must be alumina precipitation, and alumina and water cannot react spontaneously.

Aluminium sulphate is soluble in water.

Aluminum sulfate is an inorganic substance with a molecular weight and is a white crystalline powder. In the paper industry, it is used as a precipitant for rosin gum, wax emulsion and other rubber materials, as a flocculant in water treatment, and can also be used as an inner retention agent for foam fire extinguishers, raw materials for the manufacture of alum and aluminum white, petroleum decolorization, deodorant, raw materials for drugs, etc., and can also manufacture artificial Baoheng stone and high-grade ammonium alum.

Alum stone, a widely distributed rock-forming sulfate mineral, is called alum or sodium alum when the Na content exceeds K, and sometimes the slag carries a small amount of Fe3+ instead of Al3+. It occurs in sacs or thin beds within volcanic rocks such as rhyolite, coarse and andesite, which are thought to be formed by chemical reactions between these rocks and the escaping sulphur-containing vapors.

Alum stone is an alteration product produced by low-temperature hydrothermal reaction of medium-acid volcanic eruptive rocks. Cretaceous volcanic rocks in Cangnan in Zhejiang, Lushan in Anhui Province and Fuding in Fujian Province are produced in large quantities. The large deposits are near Beregovo in Ukraine, Almeria in Spain and Bradla in New South Wales, Australia.

Main uses:

1. It is used as a paper sizing agent in the paper industry to enhance the water resistance and impermeability of the paper.

2. After being dissolved in water, the fine particles and natural colloidal particles in the water can be condensed into large flocculents, which can be removed from the water, so they are used as coagulants for water supply and wastewater.

3. It is used as a turbid water purification agent, and also used as a precipitant, fixing agent, filler, etc. It is used as a raw material (astringent) for antiperspirant cosmetics in cosmetics.

4. In the fire industry, it is composed of foam fire extinguishing agent with baking soda and foaming agent.

5. Liangyou analytical reagents, mordants, tanning agents, grease decolorizers, wood preservatives.

Because the excess sodium hydroxide will react with the produced aluminum hydroxide to form sodium metaaluminate, the ion equation for the reaction of sodium hydroxide and aluminum hydroxide is: Al(OH)3 +OH- =ALO2- +2H20, and its chemical equation is: NAOH+AL(OH)3=Naalo2+H2O.

The chemical formula of sodium hydroxide is NaOH and sodium hydroxide is an alkaline hydroxide. The chemical formula of aluminum hydroxide is Al(OH)3 and aluminum hydroxide is amphoteric hydroxide. Hydrogen transport simple alumina under alkaline conditions to isomerize reaction to form aluminic acid, aluminum stuffy acid will be further decomposed into water and metaaluminic acid, metaaluminic acid will be neutralized with sodium hydroxide, so sodium hydroxide can have a chemical reaction with aluminum hydroxide, and generate sodium metaaluminate and water.

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Problem description: Is aluminum sulphate insoluble?

What is the reaction equation of aluminum and sodium hydroxide in sulfur?

Analysis: Soluble erection.

Sodium hydroxide insufficiency:

Al(3+)+3OH(-)Al(OH)3(Shenshiofibrone) sodium hydroxide excess:

al(oh)3+oh(-)alo2(-)2h2o

Both aluminum hydroxide and alumina can react with sulfuric acid to form aluminum sulfate, which is soluble, and there is no problem of tolerance for sulfuric acid, aluminum hydroxide is insoluble in water, and alumina does not react with water and is not soluble in water.

Magnesium oxide reacts with a solution of aluminum sulfate.

3mgo+al2(so4)3=mgso4+al2o3