Question

Даны растворы кислот H3PO4 и H2SO4 добавить в пробирки AgNO3 H2SO4+AgNO3.....выделяется белый осадок H3PO4+AgNO3......выделяется жёлтый осадок фосфат натрия растворим в воде, а фосфат кальция не растворим

Answer 1

H3PO4+3AgNO3=3HNO3+Ag3PO4
H2SO4+Ba(NO3)2=2HNO3+BaSO4
AlCl3+3KOH=3KCl+Al(OH)3
CuO+2HNO3=Cu(NO3)+H2O

Answer 2

Chemical Reactions of H3PO4 and H2SO4 with AgNO3

When solutions of acids H3PO4 and H2SO4 are added to separate test tubes containing AgNO3, different reactions occur, resulting in the formation of distinct precipitates.

H3PO4 + AgNO3: When H3PO4 is added to AgNO3, a yellow precipitate is formed. This reaction indicates the presence of phosphate ions, as the formation of a yellow precipitate with silver nitrate is a characteristic test for the phosphate ion.

H2SO4 + AgNO3: When H2SO4 is added to AgNO3, a white precipitate is formed. This reaction indicates the presence of sulfate ions, as the formation of a white precipitate with silver nitrate is a characteristic test for the sulfate ion.

It's important to note that sodium phosphate is soluble in water, while calcium phosphate is insoluble.

These reactions demonstrate the distinct chemical properties of phosphoric acid (H3PO4) and sulfuric acid (H2SO4) when they react with silver nitrate (AgNO3), leading to the formation of different precipitates based on the specific ions present in the acids.

These chemical reactions and their products can be utilized for qualitative analysis to identify the presence of phosphate and sulfate ions in a given solution.