Properties and Production of the Halogens

Most properties of the halogens vary in a regular fashion as we go from fluorine to iodine (T TABLE 22.2). 

The comparatively low bond enthalpy of F2 (155 kj/mol) accounts in part for the extreme reactivity of elemental fluorine. Because of its high reactivity, F2 is difficult to work with. Certain metals, such as copper and nickel, can be used to contain F2 because their surfaces form a protective coating of metal fluoride. Chlorine and the heavier halogens are also reactive, although less so than fluorine. 

Analyze We are asked to determine whether a reaction occurs when a particular halide and halogen are combined. 

Write the balanced chemical equation for the reaction between Br (aq) and Cl2(aq). 

Notice in Table 22.2 that the standard reduction potential of F2 is exceptionally high. Fluorine gas readily oxidizes water  

Do Br2 and I2 appear to be more or less soluble in CCI4 than in H2O  

EXERCISE 22.4 Predicting Chemical Reactions among the Halogens 

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