Suggest suitable materials of construction for the following applications: 

1. A 10,000 m³ storage tank for toluene; 

2. A 5:0 m³ tank for storing a 30% w/w aqueous solution of sodium chloride; 

3. A 2 m diameter, 20 m high distillation column, distilling acrylonitrile; 

4. A 100 m³ storage tank for strong nitric acid; 

5. A 500 m³ aqueous waste hold-up tank. The wastewater pH can vary from 1 to 12. The wastewater will also contain traces of organic material; 

6. A packed absorption column 0.5 m diameter, 3 m high, absorbing gaseous hydrochloric acid into water. The column will operate at essentially atmospheric pressure.