3.2Obtainingcommonsaltfromseawater.ppt

Content Content 3.1 Sea water: a vast solution (p. 43) 3.1 Sea water: a vast solution (p. 43) 3.1 Sea water: a vast solution (p. 43) 3.1 Sea water: a vast solution (p. 43) 3.2 Obtaining common salt from sea water (p. 45) 3.2 Obtaining common salt from sea water (p. 45) 3.2 Obtaining common salt from sea water (p. 45) 3.2 Obtaining common salt from sea water (p. 45) 3.2 Obtaining common salt from sea water (p. 45) 3.2 Obtaining common salt from sea water (p. 45) 3.2 Obtaining common salt from sea water (p. 45) 3.2 Obtaining common salt from sea water (p. 45) 3.2 Obtaining common salt from sea water (p. 45) 3.2 Obtaining common salt from sea water (p. 45) 3.2 Obtaining common salt from sea water (p. 45) 3.3 Obtaining pure water from sea water (p. 49) 3.3 Obtaining pure water from sea water (p. 49) 3.3 Obtaining pure water from sea water (p. 49) 3.4 Showing what species common salt contains (p. 51) 3.4 Showing what species common salt contains (p. 51) 3.4 Showing what species common salt contains (p. 51) 3.4 Showing what species common salt contains (p. 51) 3.4 Showing what species common salt contains (p. 51) 3.4 Showing what species common salt contains (p. 51) 3.5 Test for the presence of water in a sample (p. 52) 3.6 Electrolysis of sea water (p. 53) 3.6 Electrolysis of sea water (p. 53) 3.6 Electrolysis of sea water (p. 53) 3.6 Electrolysis of sea water (p. 53) Key terms (p. 56) Key terms (p. 56) Summary (p.57) Summary (p.57) Summary (p.57) Summary (p.57) Summary (p.57) Summary (p.57) Summary (p.57) Flame test ? Then dip the nichrome wire into the solid sample. Flame test ? Put the end of the wire in the Bunsen flame and observe the colour of the flame. Flame test ? The flame colours of some metallic compounds. Compound of Flame colour Potassium lilac Sodium golden yellow Calcium brick-red Copper bluish green Flame test Test for chlorides ? silver nitrate test ? Compounds made up of chlorine are called chlorides (氯化物). ? To test whether a sample is a chloride,