2) A hydrated salt is copper sulphate crystals (CuSO4.5H2O).
1) Two non-hydrated crystalline salts 2) Two neutral salts 3) Two basic salts 4) Two acid salts
2) Two neutral salts are: sodium chloride (NaCl) and sodium sulphate (Na2SO4)
3) Two basic salts are: basic copper carbonate (CuCO3.Cu(OH)2) and basic lead carbonate (PbCO3.Pb(OH)2)
4) Two acid salts are: sodium bicarbonate (NaHCO3) and sodium phosphate (NaH2PO4)
Question (21): What is the action of Na2CO3 solution on litmus and why?
Examples: K+Ca2+PO3- (Potassium calcium phosphate) , Na+K+SO42- (Sodium potassium sulphate).
Question (29): Define complex salts with examples.
1) The three anions that can be identified using dilute acids with their common ionic equations are:
Sulphate and Bi sulphate Ions 2H+ + SO32- --------à H2O + SO2
Sulphide Ion 2H+ (dil. Acid) + S 2- (salt) -------------à H2S (Gas Identified)
2) The property is that of releasing H+ ions by dilute HCl or dilute H2SO4 in solution i.e., the acidic property.
2) Another way of observing the above result is by gentle heating of blue crystals of CuSO4.5H2O directly in a test tube.
Examples of cations detected are Pb2+, Zn2+, Cu2+, Fe2+ and Fe3+.
1) An active metal (above Pb) and dilute H2SO4 gives H2 gas.