Potassium reacts with iodine to form potassium iodide.
A student writes this equation for the reaction.
K+I2→K2I\mathrm{K + I_{2} \rightarrow K_{2}I}K+I2→K2I
The student's equation is incorrect.
Write the correct balanced symbol equation for the reaction.
113 exam-style questions on OCR GCSE Chemistry 4.1 Predicting chemical reactions, covering 4.1.1 Properties and trends in Groups 1, 7 and 0, 4.1.2 Properties of the transition metals, 4.1.3 Reactivity predicted from position in the Periodic Table, and 4.1.4 Reactivity of metals and the reactivity series. Each one has a worked solution and a mark scheme showing where the marks go.