They are produced by the action of hydrogen chlorides on metals.
Mg(s) + 2HCL(aq) → MgCL2 + H2(g)
Action of acids on bases (neutralization)
NaOH(aq) + HCL(aq) → NaCL(aq) + H2O(L)
Test for Chlorides CL
With AgNO3 (i.e Silver trioxonitrate (v).
AgNO3(aq) + NaCL3(aq) → NaNO3(aq)+ AgCL(s)
A white precipitate of AgCL is formed which readily dissolves in acqueous ammonia.
PbNO3(aq)+ NaCL(aq) → NaNO3(aq)+ PbCL2(s)
A white precipitate of PbCL 2 is forned.
NB: All chlorides are stable to heat (i.e cannot be decomposed by heating ) except NH4CL which sublimes.
All chlorides are soluble except AgCL, pbCL2 and HgCL.