Use the kinetic particle model to describe how far apart the molecules are and how the molecules move in: • solid iodine • iodine gas
Describe how the volume of iodine gas changes as pressure changes.
Fill in the word equation so that it shows the halogen and halide compound that react to make iodine and potassium bromide. [BLANK] + [BLANK] → iodine + potassium bromide
Explain, in terms of halogen reactivity, why aqueous iodine does not react with aqueous potassium chloride.
Balance the chemical equation for this reaction. $\ldots\text{Na}_2\text{S}_2\text{O}_3 + \text{I}_2 \rightarrow \text{Na}_2\text{S}_4\text{O}_6 + \ldots\text{NaI}$
Explain how this diagram shows that the reaction is exothermic.
Describe a test for iodide ions. test Observations
Predict the product formed at the positive electrode.