that is where is comes from
yes it does
Using hotwater; but the drain may contain also other salts and oxides.
Radioisotopes are not salts but salts may contain radioisotopes.
They are often referred to as 'dirty ice balls.' So I would say that they are mostly made of water and contain only a little bit of dirt.
Rock salts is extracted from salt mines or oceans/seas.
Salts contain cations and anions.
Salts are salts and bases are another class of compounds: they contain the anion OH-.
Practically all salts contain a metal; exceptions, for example, are ammonium salts.
Yes, soils contain salts.
Only some salts have hydrates, not all. These salts contain in the formula water of crystallization.
Pure Epsom salts do not contain any lead. Since Epsom salts are magnesium sulfate, they contain only magnesium, sulfur, and oxygen.
Yes, salts contain an anion and a cation.