Reactions of Halogens with Halide Ions Flashcards
What colour change do you get when you mix chlorine water with a solution of potassium iodide?
The solution turns from pale green to brown.
What is produced when you mix chlorine water with a solution of potassium iodide?
Potassium chloride and iodine.
What is the ionic equation for chlorine water plus potassium iodide solution?
Cl2 (aq) + 2I- (aq) = 2Cl- (aq) + I2 (aq)
What are spectator ions?
Ions that are left out of ionic equations because they are unchanged.
What is the spectator ion in the ionic equation for chlorine water plus potassium iodide solution?
Potassium (K) 1+ ions.
What is oxidised in the reaction between chlorine water and potassium iodide solution?
Each iodide ion in potassium iodide.
What is the oxidising agent in the reaction between chlorine water and potassium iodide solution?
Each chlorine atom.
What is reduced in a redox reaction?
The oxidising agent.
What is the half equation for chlorine in
the reaction between chlorine water and potassium iodide solution?
Cl2 (aq) + 2e- (aq) = 2Cl- (aq)
What is the half equation for iodine in
the reaction between chlorine water and potassium iodide solution
2I- (aq) = I2 (aq) + 2e- (aq)
What is the symbol equation for chlorine water plus potassium iodide solution to make potassium chloride and iodine?
Cl2 (aq) + 2KI (aq) = 2KCl (aq) + I2 (aq)
What kind of reaction is a redox reaction?
A displacement reaction.
What is displaced in the reaction between a halogen and halide ion (redox reaction)?
The halogen displaces a less reactive halogen from a compound.
What is a redox reaction?
A reaction where both oxidation and reduction have occurred.
What halogen from halide compounds can fluorine displace?
Chlorine, bromine, and iodine compounds.
