Choose a suitable material of construction for the following duties: 1. 98%w/w sulfuric acid at 70C; 2. 5%w/w sulfuric acid at 30C; 3. 30%w/w hydrochloric acid at 50C; 4. 5% aqueous sodium hydroxide solution at 30C; 5. Concentrated aqueous sodium hydroxide solution at 50C; 6. 5%w/w nitric acid at 30C; 7. Boiling concentrated nitric acid; 8. 10%w/w sodium chloride solution; 9. A 5%w/w solution of cuprous chloride in hydrochloric acid; 10. 10%w/w hydrofluoric acid. In each case, select the material for a 50mm pipe operating at approximately 2 bar pressure