Chemical Properties of Salt:

1, Salt reacts with a metal in a replacement reaction to form another metal and another salt.

2. Salts react with acids to form another salt and another acid.

3. A salt reacts with a base to form another salt and another base.

4, A salt reacts with a salt to produce two other salts.

Chemical equations:

1, acid + salt → new salt + new acid

CaCO3 + 2HCl == CaCl2 + H2O + CO2 ↑

Na2CO3 + 2HCl == 2NaCl + H2O + CO2 ↑

HCl + AgNO3 == AgCl↓ + HNO3

H2SO4+BaCl2==BaSO4↓+2HCl

Ba(NO3)2+H2SO4==BaSO4↓+2HNO3

NaHCO3+HCl==NaCl+H2O+CO2↑

2, Salt 1 + Salt 2→New Salt 1+New Salt 2

KCl + AgNO3==AgCl↓+KNO3

NaCl+AgNO3==AgCl↓+NaNO3

Na2SO4+BaCl2==BaSO4↓+2NaCl

BaCl2+2AgNO3==2AgCl↓+Ba(NO3)2

CaCl2+ Na2CO3==CaCO3↓+2NaCl

3, salt + base → new salt + new base

CuSO4+2NaOH==Cu(OH)2↓+Na2SO4

FeCl3+3NaOH==Fe(OH)3↓+3NaCl

Ca(OH)2+Na2CO3==CaCO3↓+2NaCl

BaCl2+2AgNO3==2AgCl↓+Ba(NO3)2

CaCl2+2AgCO3==2AgCl CaCO3↓+2NaOH

NaOH+NH4Cl==NaCl+NH3↑+H2O

MgCl2+2NaOH==Mg(OH)2↓+2NaCl

Fe2(SO4)3+3Ba(OH)2=3BaSO4↓+2Fe(OH)3↓

Chemical Phenomenon

Metal monomers + salt (solution) - another metal + another salt, iron and copper sulfate reaction: Fe + CuSO4 == Cu + FeSO4. phenomenon: iron bar surface covered with a layer of red material, the solution from blue to light green. The zinc plate is put into the copper sulfate solution: CuSO4+Zn==ZnSO4+Cu, phenomenon: the surface of the zinc plate is covered with a layer of red material, and the solution turns from blue to colorless.