Carry out reactions confirming the characteristic chemical properties of acids (for example, H2 SO4)

Interaction with metals:

if the acid is diluted: Mg + H2SO4 → MgSO4 + H2 ↑;

if the acid is concentrated:

with active metals 8Al + 15H2SO4 → 4Al2 (SO4) 3 + 12H2O + 3H2S;

with metals of medium activity 2Cr + 4H2SO4 → Cr 2 (SO4) 3 + 4H2O + S;

with low-active metals 2Bi + 6H2SO4 → Bi2 (SO4) 3 + 6H2O + 3SO2.

Interaction with basic oxides:

MgO + H2SO4 → MgSO4 + H2O.

Interaction with bases:

Ba (OH) 2 + H2SO4 → BaSO4 ↓ + 2H2O.

Interaction with salts of weak acids:

BaBr2 + H2SO4 → BaSO4 ↓ + 2HBr.