The insoluble bases are the four bases that are insoluble in water

According to the solubility of alkali in water, it can be divided into soluble alkali and insoluble alkali.

Among the common bases, sodium hydroxide, potassium hydroxide, barium hydroxide, ammonia (the main component) and so on are soluble bases. Soluble bases are: rubidium hydroxide (RBOH), cesium hydroxide (CSOH), thallium hydroxide (TLOH·H2O), lithium hydroxide (LiOH), radium hydroxide [Ra(OH)2].

Slightly soluble alkalis are: nickel hydroxide [Ni(OH)2], strontium hydroxide [SR(OH)2], calcium hydroxide [Ca(OH)2] (solid calcium hydroxide is slightly soluble in water, lime water is calcium hydroxide, that is, an aqueous solution of hydrated lime).

Others are insoluble bases, such as magnesium hydroxide mg(oh)2, aluminum hydroxide al(oh)3, manganese hydroxide mn(oh)2, zinc hydroxide zn(oh)2, iron hydroxide fe(oh)3, ferrous hydroxide fe(oh)2, copper hydroxide cu(oh)2, etc.

In junior high school, only Ca(OH)2 NaOH BA(OH)2 NH4OH can be dissolved

Haven't you memorized that mantra?

Potassium, sodium, ammonium, nitrate are soluble, hydrochloride is insoluble silver mercurous;

Sulfate is insoluble barium and lead, carbon phosphate is mostly insoluble.

Most acids are soluble and alkaline, and only potassium, sodium, ammonium, and barium are soluble.

Remember that soluble in water: ammonia, potassium hydroxide, sodium hydroxide, barium hydroxide, calcium hydroxide (sodium ammonia, sodium barium calcium), and other alkalis are insoluble in water.

Aluminum hydroxide, iron hydroxide, magnesium hydroxide and the like.

mg(oh)2、cu(oh)2、fe(oh)2、fe(oh)3………I remember when I was in junior high school, there was a table at the back of the chemistry book, and you memorized it yourself, which is very important!!

Insoluble in water, four alkali silicon hydroxideIron hydroxide, ferrous hydroxide andCopper hydroxide

Water-insoluble alkalis include silicon hydroxide, iron hydroxide, copper hydroxide, sulfonic acid, sulfuric acid, thiocarboxylic acid, formic acid, and magnesium hydroxide.

Aluminum hydroxide, manganese hydroxide, zinc hydroxide, ferrous hydroxide, etc.

Alkali is an inorganic compound, and alkali has an astringent taste, which can make litmus paper blue, and can neutralize with acid to form salt tolerance; And alkali is also an important organic chemical raw material, mainly used in the production of flat glass, glass products and ceramic glaze.

Insoluble alkalis in water include silicon hydroxide, iron hydroxide, copper hydroxide, sulfonic acid, sulfuric acid, thiocarboxylic acid, formic acid, magnesium hydroxide, aluminum hydroxide, manganese hydroxide, zinc hydroxide, iron hydroxide, ferrous hydroxide, etc.

Alkali is an inorganic compound, and alkali has an astringent taste, which can make the test paper turn blue, and can neutralize with acid to form salt; And alkali is also an important organic chemical raw material, mainly used in the production of flat glass, glass products and Tao Gaozi porcelain enamel.