• Explain the trend in boiling points of Cl2, Br2 and I2. Week 12 • Explain the trend in boiling points of Cl2, Br2 and I2. • Explain the trend in reactivity for the Group 7 elements. • Describe the redox reactions of the Group 7 elements with other halide ions. • Describe and interpret, using oxidation numbers, the reaction of chlorine with water and aqueous sodium hydroxide. © Pearson Education Ltd 2008 This document may have been altered from the original

The physical states of the halogens Week 12 The physical states of the halogens © Pearson Education Ltd 2008 This document may have been altered from the original

Electronic configurations of halogen atoms Week 12 Electronic configurations of halogen atoms © Pearson Education Ltd 2008 This document may have been altered from the original

Week 12 • Interpret and make predictions from the chemical and physical properties of the Group 7 elements/compounds. • Contrast the benefits and risks of chlorine’s use as a water treatment. • Describe the precipitation reactions of aqueous anions Cl–, Br– and I– with aqueous silver ions, followed by aqueous ammonia. • Recognise the use of these precipitation reactions as a test for different halide ions. © Pearson Education Ltd 2008 This document may have been altered from the original