Define salts.give examples
Answers
A salt can be defined as a compound made up of positive metallic ions and negative ions derived from an acid.
Types of Salts
There are different kinds of salts. These include:
1. Normal salt
The hydrogen ions of the acid are completely replaced by metallic ions . Examples are NaCl, CuSO4, KNO3, and CaCO3. Normal salts are electrically neutral.
2. Acid salt
The salt still has hydrogen atom(s) from an acid which can further be replaced by metallic ions. Examples include: NaHSO4, NaHCO3 and NaHS
3. Basic salt
The salt contains hydroxides together with metallic ions and negative ions from an acid. Examples are basic zinc chloride, ZnOHCl, basic magnesium chloride.
4. Double salt
Salt that ionizes to produce three different types of ions in solution, two of these are usually positively charged and the other negatively charged. Examples are ammonium iron(II) tetraoxosulphate(VI) hexahydrate, (NH4)2 Fe(SO4)2.6H2O; potash alum or aluminium potassium tetraoxosulphate(VI) dodecahydrate, KAl(SO4)2. 12H2O; and chrome alum or chromium(III) potassium tetraoxosulphate(VI) dodecahydrate, KCr(SO4)2. 12H2O.
5. Complex salt
The salt contains complex ions, i.e. ions consisting of a charged group of atoms. Examples are sodium tetrahydroxozincate(II)
Na2Zn(OH)4(aq) reversible reaction arrow 2Na+(aq) + Zn(OH)2-4(aq)
potassium hexacyanoferrate(II)
K4Fe(CN)6(aq) reversible reaction arrow 4K+(aq) + [Fe(CN)6]4-(aq)
Answer:
A white crystalline substance which gives sea water it's characteristic taste and is used for seasoning or preserving food.