Distribute by classes – CuO, Mn2O7, N2O3, HNO3, H2SO3, H2S, Fe (OH) 2, NaOH, Al (OH)

| September 19, 2021 | education

Distribute by classes – CuO, Mn2O7, N2O3, HNO3, H2SO3, H2S, Fe (OH) 2, NaOH, Al (OH) 3, Ca3 (PO4) 2, Znl2, Mg (NO2) 2

Oxides
CuO – basic copper (II) oxide.
Mn2O7 – amphoteric manganese (VII) oxide.
N2O3 – nitric oxide (III), acidic.
How to recognize: a substance is a combination of oxygen and some element (with less electronegativity than oxygen).

Bases (hydroxides)
Fe (OH) 2 – iron (II) hydroxide.
NaOH is sodium hydroxide.
Al (OH) 3 – aluminum hydroxide.
How to recognize: compounds of the element and the hydroxyl group OH.

Acids
HNO3 is nitric acid.
H2SO3 – sulfurous acid.
H2S – hydrogen sulfide.
How to recognize: they start with H (hydrogen), continue with an inorganic substance (N, S, Cl, etc.). If the acid is oxygen-containing, then O – oxygen appears at the end of the formula of the substance.

Salt
Ca2 (PO4) 2 – calcium phosphate.
ZnI2 is zinc iodide.
Mg (No2) 2 – magnesium nitrite.
How to identify: consist of metals and acid residues (part of the acid without H or something similar to it – SO4, Cl, NO2, N2O3, etc.). In general, when dividing substances into classes, it is easier to first calculate the other three groups, and then what remains is attributed to salts.



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